Local Data Search
A total of 381 results found. Show Results on Map.
| Rank | Median Household Income ▼ | City / Population |
| 1. | $178,542 | Fox Chapel, PA / 5,400 |
| 2. | $135,781 | Edgeworth, PA / 1,614 |
| 3. | $118,438 | Sewickley Heights, PA / 761 |
| 4. | $116,250 | Ben Avon Heights, PA / 396 |
| 5. | $114,981 | Franklin Park, PA / 12,985 |
| 6. | $113,571 | Glen Osborne Borough, PA / 460 |
| 7. | $112,828 | Upper Saint Clair, PA / 19,188 |
| 8. | $111,591 | Bradford Woods, PA / 1,138 |
| 9. | $106,750 | Rosslyn Farms, PA / 498 |
| 10. | $106,250 | Thornburg, PA / 462 |
| 11. | $95,662 | Lake Tomahawk, OH / 458 |
| 12. | $92,375 | Mcmurray, PA / 4,889 |
| 13. | $91,979 | Thompsonville, PA / 4,009 |
| 14. | $91,033 | Fox Run, PA / 3,450 |
| 15. | $88,571 | Sewickley Hills, PA / 731 |
| 16. | $87,426 | Seven Fields, PA / 2,736 |
| 17. | $87,070 | Lake Mohawk, OH / 1,737 |
| 18. | $81,883 | Murrysville, PA / 19,847 |
| 19. | $80,158 | Fernway, PA / 12,280 |
| 20. | $79,333 | Hickory, PA / 892 |
| 21. | $79,100 | Churchill, PA / 3,076 |
| 22. | $78,843 | Ben Avon, PA / 1,949 |
| 23. | $74,970 | Gibsonia, PA / 2,643 |
| 24. | $74,596 | Nixon, PA / 1,442 |
| 25. | $74,583 | Rennerdale, PA / 1,421 |
| 26. | $74,034 | Allison Park, PA / 22,293 |
| 27. | $70,398 | Green Tree, PA / 4,462 |
| 28. | $70,293 | Jefferson Hills, PA / 10,375 |
| 29. | $69,882 | Economy Borough, PA / 9,004 |
| 30. | $69,500 | Bakerstown, PA / 2,066 |
| 31. | $68,571 | Bell Acres, PA / 1,418 |
| 32. | $68,068 | Callery, PA / 355 |
| 33. | $67,875 | Clark, PA / 600 |
| 34. | $67,778 | Lake Latonka, PA / 909 |
| 35. | $67,500 | Glenshaw, PA / 9,196 |
| 36. | $66,960 | Muse, PA / 2,660 |
| 37. | $66,941 | Level Green, PA / 3,712 |
| 38. | $66,700 | Plum, PA / 26,849 |
| 39. | $65,492 | South Park Township, PA / 13,448 |
| 40. | $65,061 | Oak Hills, PA / 2,419 |
| 41. | $64,272 | Pleasant Hills, PA / 8,259 |
| 42. | $64,192 | Canfield, OH / 7,493 |
| 43. | $63,304 | Meridian, PA / 3,753 |
| 44. | $62,750 | Georgetown, PA / 139 |
| 45. | $62,384 | Shanor-Northvue, PA / 5,071 |
| 46. | $61,875 | Patterson Heights, PA / 711 |
| 47. | $61,074 | Bethel Park, PA / 32,249 |
| 48. | $60,268 | New Galilee, PA / 424 |
| 49. | $59,176 | Howland Center, OH / 5,489 |
| 50. | $59,096 | West Hills, PA / 1,558 |
| 51. | $58,750 | Frankfort Springs, PA / 166 |
| 52. | $58,696 | Cecil-Bishop, PA / 2,525 |
| 53. | $58,400 | Edgewood, PA / 3,137 |
| 54. | $58,125 | West Liberty, PA / 392 |
| 55. | $57,584 | Mineral Ridge, OH / 3,413 |
| 56. | $57,254 | Monroeville, PA / 28,308 |
| 57. | $57,197 | Vienna Center, OH / 717 |
| 58. | $57,014 | Oakdale, PA / 1,333 |
| 59. | $56,802 | Mcgovern, PA / 3,020 |
| 60. | $56,563 | Cheswick, PA / 1,655 |
| 61. | $56,389 | Hilltop, OH / 723 |
| 62. | $56,250 | Karns City, PA / 344 |
| 62. | $56,250 | Cherry Valley, PA / 55 |
| 64. | $55,833 | Polk, PA / 1,057 |
| 65. | $55,511 | Carnot-Moon, PA / 11,279 |
| 66. | $55,395 | Aspinwall, PA / 2,783 |
| 67. | $55,188 | Forest Hills, PA / 6,540 |
| 68. | $54,393 | Sturgeon, PA / 1,392 |
| 69. | $54,185 | Beaver, PA / 4,556 |
| 70. | $54,021 | Sewickley, PA / 3,812 |
| 71. | $53,750 | Mcdonald, OH / 3,307 |
| 72. | $53,365 | Pennsbury Village, PA / 670 |
| 73. | $53,333 | Mars, PA / 1,798 |
| 74. | $53,125 | Seneca, PA / 1,051 |
| 75. | $52,961 | Hookstown, PA / 196 |
| 76. | $52,917 | Noblestown, PA / 308 |
| 77. | $52,875 | Harmony, PA / 899 |
| 78. | $52,619 | South Canal, OH / 1,281 |
| 79. | $51,595 | Emsworth, PA / 2,561 |
| 80. | $51,420 | Oakmont, PA / 6,360 |
| 81. | $51,331 | Chalfant, PA / 938 |
| 82. | $51,250 | West Farmington, OH / 466 |
| 82. | $51,250 | Sheakleyville, PA / 153 |
| 84. | $51,010 | Champion Heights, OH / 6,646 |
| 85. | $50,978 | Poland, OH / 2,601 |
| 86. | $50,786 | Ohioville, PA / 3,566 |
| 87. | $50,625 | Russellton, PA / 1,394 |
| 88. | $50,556 | Clinton, PA / 463 |
| 89. | $50,453 | Cortland, OH / 7,028 |
| 90. | $50,301 | Whitehall, PA / 13,921 |
| 91. | $50,258 | West View, PA / 6,796 |
| 92. | $50,125 | Burgettstown, PA / 1,517 |
| 93. | $50,000 | Fairview, PA / 237 |
| 94. | $49,957 | Churchill, OH / 2,644 |
| 95. | $49,792 | Manorville, PA / 379 |
| 96. | $49,773 | Bruin, PA / 523 |
| 97. | $49,750 | Cooperstown, PA / 522 |
| 98. | $49,688 | Connoquenessing, PA / 595 |
| 99. | $49,643 | Industry, PA / 1,801 |
| 100. | $49,533 | Homeacre-Lyndora, PA / 7,306 |
| 101. | $49,423 | West Leechburg, PA / 1,473 |
| 102. | $49,320 | Hermitage, PA / 16,155 |
| 103. | $49,148 | Evans City, PA / 1,948 |
| 104. | $48,846 | Glenmoor, OH / 1,706 |
| 105. | $48,807 | Cochranton, PA / 994 |
| 106. | $48,802 | Freeport, PA / 1,786 |
| 107. | $48,761 | Louisville, OH / 9,121 |
| 108. | $48,750 | West Homestead, PA / 2,046 |
| 108. | $48,750 | Haysville, PA / 75 |
| 108. | $48,750 | Bairdford, PA / 674 |
| 111. | $48,542 | Fallston, PA / 328 |
| 112. | $48,514 | Baldwin, PA / 19,622 |
| 113. | $48,304 | Meadowood, PA / 2,550 |
| 114. | $48,269 | New Wilmington, PA / 2,758 |
| 115. | $48,100 | Zelienople, PA / 3,875 |
| 116. | $48,065 | Langeloth, PA / 438 |
| 117. | $47,935 | Oklahoma borough, PA / 812 |
| 118. | $47,891 | Liberty, PA / 2,547 |
| 119. | $47,813 | Portersville, PA / 255 |
| 120. | $47,500 | West Middlesex, PA / 822 |
| 121. | $47,228 | Canonsburg, PA / 8,917 |
| 122. | $47,073 | Lower Burrell, PA / 11,906 |
| 123. | $47,061 | Gastonville, PA / 2,809 |
| 124. | $46,947 | Calcutta, OH / 4,279 |
| 125. | $46,944 | New Middletown, OH / 1,847 |
| 126. | $46,917 | Midway borough, PA / 882 |
| 127. | $46,875 | Lordstown, OH / 3,429 |
| 128. | $46,780 | Dormont, PA / 8,652 |
| 129. | $46,761 | Pottery Addition, OH / 192 |
| 130. | $46,719 | Prospect, PA / 1,150 |
| 131. | $46,667 | New Bedford, PA / 653 |
| 132. | $46,429 | West Middletown, PA / 124 |
| 133. | $46,294 | Sharpsville, PA / 4,436 |
| 134. | $46,211 | Kinsman Center, OH / 750 |
| 135. | $46,146 | Ford Cliff, PA / 460 |
| 136. | $46,136 | Sandy Lake, PA / 587 |
| 137. | $46,094 | Conneaut Lake, PA / 566 |
| 138. | $46,023 | Summitville, OH / 161 |
| 139. | $45,926 | Brilliant, OH / 1,738 |
| 140. | $45,700 | Big Beaver, PA / 1,911 |
| 141. | $45,625 | Pleasant View, PA / 1,076 |
| 142. | $45,598 | Brookfield Center, OH / 1,472 |
| 143. | $45,362 | Dravosburg, PA / 1,838 |
| 144. | $45,345 | Maple Ridge, OH / 792 |
| 145. | $45,285 | Brentwood, PA / 9,711 |
| 146. | $45,125 | Hendersonville, PA / 196 |
| 147. | $45,124 | Crafton, PA / 6,031 |
| 148. | $45,078 | West Pittsburg, PA / 672 |
| 149. | $45,038 | Carnegie, PA / 7,973 |
| 150. | $44,876 | Hubbard, OH / 7,920 |
| 151. | $44,821 | Worthington, PA / 785 |
| 152. | $44,795 | Castle Shannon, PA / 8,301 |
| 153. | $44,750 | Kennerdell, PA / 188 |
| 154. | $44,688 | Bergholz, OH / 664 |
| 155. | $44,671 | Grove City, PA / 8,295 |
| 156. | $44,659 | Wampum, PA / 840 |
| 157. | $44,564 | Ingram, PA / 3,370 |
| 158. | $44,190 | West Mifflin, PA / 20,497 |
| 159. | $44,125 | Harrisville, PA / 921 |
| 160. | $44,091 | Imperial, PA / 2,324 |
| 161. | $44,083 | West Mayfield, PA / 1,198 |
| 162. | $43,963 | West Kittanning, PA / 1,278 |
| 163. | $43,832 | Boardman, OH / 35,404 |
| 164. | $43,750 | East Butler, PA / 705 |
| 164. | $43,750 | Geneva, PA / 123 |
| 166. | $43,611 | Cross Creek, PA / 138 |
| 167. | $43,438 | Orangeville, OH / 153 |
| 167. | $43,438 | Valencia, PA / 461 |
| 169. | $43,250 | Saint Petersburg, PA / 315 |
| 170. | $43,214 | South Heights, PA / 401 |
| 171. | $43,043 | Garrettsville, OH / 2,660 |
| 172. | $43,038 | Springdale, PA / 3,455 |
| 173. | $42,708 | Eau Claire, PA / 236 |
| 174. | $42,375 | Mercer, PA / 1,680 |
| 175. | $42,358 | Leetonia, OH / 1,961 |
| 176. | $42,339 | Oakwood, PA / 2,095 |
| 177. | $42,308 | Conway, PA / 2,130 |
| 178. | $42,188 | Paris, PA / 791 |
| 179. | $42,183 | Austintown, OH / 30,240 |
| 180. | $42,153 | Lawrence, PA / 436 |
| 181. | $42,083 | North Apollo, PA / 1,226 |
| 182. | $41,858 | Robertsville, OH / 318 |
| 183. | $41,806 | Richmond, OH / 500 |
| 184. | $41,797 | East Palestine, OH / 4,766 |
| 185. | $41,771 | La Croft, OH / 1,160 |
| 186. | $41,750 | Stoneboro, PA / 1,040 |
| 186. | $41,750 | New Waterford, OH / 1,100 |
| 188. | $41,691 | Saxonburg, PA / 1,852 |
| 189. | $41,645 | Trafford, PA / 3,168 |
| 190. | $41,607 | Enon Valley, PA / 338 |
| 191. | $41,574 | Joffre, PA / 629 |
| 192. | $41,429 | Sligo, PA / 860 |
| 193. | $41,316 | Lenape Heights, PA / 1,130 |
| 194. | $41,271 | East Mckeesport, PA / 2,289 |
| 195. | $41,250 | Avella, PA / 716 |
| 195. | $41,250 | Oakland CDP, PA / 1,972 |
| 195. | $41,250 | Foxburg, PA / 193 |
| 195. | $41,250 | Barkeyville, PA / 298 |
| 199. | $41,146 | Emlenton, PA / 730 |
| 200. | $41,042 | South New Castle, PA / 658 |
| 201. | $41,019 | Unionville, PA / 1,050 |
| 202. | $40,948 | Mcdonald, PA / 2,364 |
| 203. | $40,865 | Applewold, PA / 300 |
| 203. | $40,865 | Wall, PA / 546 |
| 205. | $40,833 | Hannasville, PA / 189 |
| 206. | $40,750 | Jackson Center, PA / 204 |
| 207. | $40,670 | Craig Beach, OH / 1,118 |
| 208. | $40,625 | Follansbee, WV / 2,999 |
| 209. | $40,491 | Girard, OH / 10,258 |
| 210. | $40,417 | Leavittsburg, OH / 1,942 |
| 211. | $40,370 | Monaca, PA / 5,801 |
| 212. | $40,363 | Wintersville, OH / 3,871 |
| 213. | $40,357 | Knox, PA / 1,180 |
| 213. | $40,357 | Hyde Park borough, PA / 608 |
| 215. | $40,313 | Blawnox, PA / 1,406 |
| 215. | $40,313 | Homeworth, OH / 921 |
| 217. | $40,201 | Carrollton, OH / 3,397 |
| 218. | $40,170 | New Castle Northwest, PA / 1,296 |
| 219. | $40,163 | Templeton, PA / 374 |
| 220. | $39,949 | Brackenridge, PA / 3,274 |
| 221. | $39,938 | Swissvale, PA / 9,041 |
| 222. | $39,699 | Weirton, WV / 19,753 |
| 223. | $39,676 | Washingtonville, OH / 903 |
| 224. | $39,586 | Bellevue, PA / 8,375 |
| 225. | $39,500 | Hanoverton, OH / 412 |
| 226. | $39,375 | Hiram, OH / 1,241 |
| 227. | $39,271 | Masury, OH / 2,290 |
| 228. | $39,191 | Ellport, PA / 1,317 |
| 229. | $39,177 | Hooverson Heights, WV / 3,082 |
| 230. | $39,167 | Koppel, PA / 689 |
| 230. | $39,167 | Chicora, PA / 1,114 |
| 232. | $39,063 | Glenfield, PA / 175 |
| 233. | $39,024 | Ellwood City, PA / 8,206 |
| 234. | $38,947 | Orwell, OH / 1,475 |
| 235. | $38,942 | Rimersburg, PA / 1,006 |
| 236. | $38,795 | Chester, WV / 2,585 |
| 237. | $38,750 | Jamestown, PA / 754 |
| 237. | $38,750 | Pymatuning South, PA / 464 |
| 239. | $38,697 | Mingo Junction, OH / 3,461 |
| 240. | $38,598 | Slippery Rock, PA / 3,678 |
| 241. | $38,585 | Baden, PA / 4,155 |
| 242. | $38,542 | Enlow, PA / 758 |
| 243. | $38,515 | Munhall, PA / 11,456 |
| 244. | $38,466 | Leechburg, PA / 2,204 |
| 245. | $38,464 | Columbiana, OH / 6,369 |
| 246. | $38,462 | Lowellville, OH / 1,155 |
| 247. | $38,456 | Sebring, OH / 4,512 |
| 248. | $38,346 | Atwater, OH / 616 |
| 249. | $38,056 | Chewton, PA / 484 |
| 250. | $37,969 | Houston, PA / 1,368 |
| 251. | $37,946 | Petrolia, PA / 170 |
| 252. | $37,898 | Whitaker, PA / 1,425 |
| 253. | $37,679 | Fredonia, PA / 519 |
| 254. | $37,250 | Kiskimere, PA / 40 |
| 255. | $37,240 | Harwick, PA / 908 |
| 256. | $37,192 | Conneaut Lakeshore, PA / 2,571 |
| 257. | $37,132 | Leetsdale, PA / 1,168 |
| 258. | $36,839 | Bridgeville, PA / 5,149 |
| 259. | $36,719 | Port Vue, PA / 3,840 |
| 260. | $36,667 | Utica, PA / 159 |
| 261. | $36,652 | New Kensington, PA / 13,372 |
| 262. | $36,563 | Pitcairn, PA / 3,339 |
| 263. | $36,464 | Mckinley Heights, OH / 1,090 |
| 264. | $36,250 | New Alexandria, OH / 264 |
| 265. | $36,019 | Pittsburgh, PA / 308,003 |
| 266. | $35,893 | Minerva, OH / 3,346 |
| 267. | $35,833 | Eastvale, PA / 172 |
| 268. | $35,754 | Millvale, PA / 3,781 |
| 269. | $35,673 | West Sunbury, PA / 188 |
| 270. | $35,577 | Toronto, OH / 5,015 |
| 271. | $35,521 | Struthers, OH / 10,892 |
| 272. | $35,417 | Atlantic, PA / 50 |
| 273. | $35,341 | Campbell, OH / 8,444 |
| 274. | $35,215 | Niles, OH / 19,464 |
| 275. | $35,192 | Hartstown, PA / 180 |
| 276. | $35,042 | Sugarcreek, PA / 5,294 |
| 277. | $35,000 | Volant, PA / 172 |
| 278. | $34,782 | Bolindale, OH / 2,870 |
| 279. | $34,732 | Franklin, PA / 6,648 |
| 280. | $34,653 | Turtle Creek, PA / 5,415 |
| 281. | $34,611 | Beloit, OH / 1,241 |
| 282. | $34,583 | Yankee Lake, OH / 69 |
| 283. | $34,559 | Heidelberg, PA / 1,285 |
| 283. | $34,559 | Southview, PA / 150 |
| 285. | $34,500 | Andover, OH / 1,151 |
| 286. | $34,434 | Etna, PA / 3,505 |
| 287. | $34,375 | New Lebanon, PA / 250 |
| 288. | $34,089 | Curtisville, PA / 1,087 |
| 289. | $34,000 | Irondale, OH / 400 |
| 290. | $33,939 | Salem, OH / 12,383 |
| 291. | $33,900 | Slovan, PA / 403 |
| 292. | $33,750 | Parker, PA / 907 |
| 292. | $33,750 | Homewood, PA / 125 |
| 294. | $33,681 | Apollo, PA / 1,620 |
| 295. | $33,669 | Avalon, PA / 4,762 |
| 296. | $33,561 | Rochester, PA / 3,712 |
| 297. | $33,542 | East Vandergrift, PA / 624 |
| 298. | $33,523 | Ravenna, OH / 11,773 |
| 299. | $33,438 | Maplewood Park, OH / 291 |
| 300. | $33,365 | Wheatland, PA / 653 |
| 301. | $33,333 | East Rochester, PA / 693 |
| 302. | $33,203 | New Brighton, PA / 6,111 |
| 303. | $33,135 | Kittanning, PA / 4,127 |
| 304. | $33,089 | Wellsburg, WV / 2,816 |
| 305. | $33,017 | Glassport, PA / 4,536 |
| 306. | $32,879 | Malvern, OH / 1,102 |
| 307. | $32,669 | Vandergrift, PA / 5,269 |
| 308. | $32,545 | Greenville, PA / 6,007 |
| 309. | $32,400 | Bessemer, PA / 1,188 |
| 310. | $32,378 | Newton Falls, OH / 4,820 |
| 311. | $32,344 | Woodland Heights, PA / 1,317 |
| 312. | $32,191 | Pymatuning Central, PA / 2,372 |
| 313. | $32,188 | Bloomingdale, OH / 133 |
| 314. | $32,177 | Bulger, PA / 487 |
| 315. | $32,087 | Coraopolis, PA / 5,706 |
| 316. | $32,031 | Bridgewater, PA / 673 |
| 317. | $31,982 | Steubenville, OH / 18,578 |
| 318. | $31,932 | New Beaver, PA / 1,463 |
| 319. | $31,875 | Clintonville, PA / 466 |
| 320. | $31,812 | Alliance, OH / 22,545 |
| 321. | $31,719 | Amsterdam, OH / 638 |
| 322. | $31,681 | Tarentum, PA / 4,568 |
| 323. | $31,663 | Mount Oliver, PA / 3,467 |
| 324. | $31,452 | Salineville, OH / 1,421 |
| 325. | $31,125 | Adamsville, PA / 94 |
| 326. | $31,083 | Shippingport, PA / 195 |
| 327. | $31,023 | Aliquippa, PA / 9,779 |
| 328. | $30,833 | Darlington, PA / 194 |
| 329. | $30,832 | Warren, OH / 42,667 |
| 330. | $30,758 | Verona, PA / 2,655 |
| 331. | $30,735 | Braddock Hills, PA / 1,863 |
| 332. | $30,690 | New Castle, PA / 23,836 |
| 333. | $30,655 | Beaver Falls, PA / 9,092 |
| 334. | $30,526 | Reynolds Heights, PA / 2,085 |
| 335. | $30,317 | Butler, PA / 14,035 |
| 336. | $30,266 | Ambridge, PA / 7,126 |
| 337. | $30,089 | Sharpsburg, PA / 3,444 |
| 338. | $30,000 | Oil City, PA / 10,707 |
| 339. | $29,750 | Rogers, OH / 237 |
| 340. | $29,684 | Midland, PA / 2,704 |
| 341. | $29,620 | Wilkinsburg, PA / 16,348 |
| 342. | $29,563 | Lake Arthur Estates, PA / 618 |
| 343. | $29,512 | Lisbon, OH / 2,901 |
| 344. | $29,411 | Sharon, PA / 14,456 |
| 345. | $29,318 | Westland, PA / 101 |
| 346. | $29,265 | Freedom, PA / 1,558 |
| 347. | $29,239 | Ford City, PA / 3,050 |
| 348. | $29,125 | Windham, OH / 2,303 |
| 349. | $28,958 | Wellsville, OH / 3,647 |
| 350. | $28,397 | East Liverpool, OH / 11,535 |
| 351. | $28,058 | Farrell, PA / 5,304 |
| 352. | $27,188 | Newell, WV / 1,044 |
| 353. | $27,179 | Orchard Hills, PA / 2,184 |
| 354. | $26,927 | East Brady, PA / 1,128 |
| 355. | $26,825 | West Hill, OH / 2,147 |
| 356. | $26,719 | North Vandergrift, PA / 411 |
| 357. | $26,667 | Glasgow, PA / 52 |
| 358. | $26,250 | Empire, OH / 212 |
| 359. | $25,943 | Mckeesport, PA / 20,341 |
| 360. | $25,931 | Frizzleburg, PA / 602 |
| 361. | $25,217 | North Braddock, PA / 5,079 |
| 362. | $25,063 | Homestead, PA / 3,216 |
| 363. | $24,896 | Atlasburg, PA / 229 |
| 364. | $24,839 | Limaville, OH / 259 |
| 365. | $24,760 | New Cumberland, WV / 1,243 |
| 366. | $24,444 | Arnold, PA / 5,254 |
| 367. | $24,318 | Youngstown, OH / 69,585 |
| 368. | $24,167 | Damascus, OH / 248 |
| 369. | $23,750 | Stratton, OH / 278 |
| 370. | $23,631 | Meadow Lands, PA / 405 |
| 371. | $23,013 | Morgandale, OH / 1,328 |
| 372. | $22,800 | East Pittsburgh, PA / 1,984 |
| 373. | $22,685 | Kerrtown, PA / 329 |
| 374. | $21,944 | Callensburg, PA / 128 |
| 375. | $21,909 | Duquesne, PA / 5,826 |
| 376. | $21,682 | Wilmerding, PA / 2,109 |
| 377. | $21,667 | Braddock, PA / 2,029 |
| 378. | $20,767 | Mckees Rocks, PA / 6,127 |
| 379. | $19,336 | Rankin, PA / 2,036 |
| 380. | $15,000 | Negley, OH / 239 |
| 381. | $2,499 | East Rochester, OH / 300 |
Please note that we only rank locations with 'Median Household Income' data. The rank above might not be a complete list. Locations without 'Median Household Income' data are not listed.
*ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.