| Pennsylvania |  |
AGE DISTRIBUTION
Drawn as a "population pyramid," an area's age-sex structure hints at its patterns of growth. A top heavy pyramid, like the one for Grant County, North Dakota , suggests negative population growth that might be due to any number of factors, including high death rates, low birth rates, and increased emigration from the area. A bottom heavy pyramid, like the one drawn for Orange County, Florida , suggests high birthrates, falling or stable death rates, and the potential for rapid population growth. Most areas, however, fall somewhere between these two extremes and have a population pyramid that resembles a square, indicating slow and sustained growth with the birth rate exceeding the death rate, though not by a great margin.
| Age Distribution by Sex, 2000 | ||||
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Male
|
Female
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| Number | Percent | Number | Percent | |
| Total Population | 5,929,663 | 48.3% | 6,351,391 | 51.7% |
| 0-4 | 372,448 | 3.0% | 355,356 | 2.9% |
| 5-9 | 424,244 | 3.5% | 403,701 | 3.3% |
| 10-14 | 443,602 | 3.6% | 420,247 | 3.4% |
| 15-19 | 433,692 | 3.5% | 417,294 | 3.4% |
| 20-24 | 372,883 | 3.0% | 373,203 | 3.0% |
| 25-29 | 366,302 | 3.0% | 366,399 | 3.0% |
| 30-34 | 410,504 | 3.3% | 417,281 | 3.4% |
| 35-39 | 468,805 | 3.8% | 482,595 | 3.9% |
| 40-44 | 492,309 | 4.0% | 504,367 | 4.1% |
| 45-49 | 448,805 | 3.7% | 459,845 | 3.7% |
| 50-54 | 389,762 | 3.2% | 406,620 | 3.3% |
| 55-59 | 297,574 | 2.4% | 322,395 | 2.6% |
| 60-64 | 241,186 | 2.0% | 270,470 | 2.2% |
| 65-69 | 218,129 | 1.8% | 262,527 | 2.1% |
| 70-74 | 211,385 | 1.7% | 277,231 | 2.3% |
| 75-79 | 169,078 | 1.4% | 253,233 | 2.1% |
| 80-84 | 103,305 | 0.8% | 186,710 | 1.5% |
| 85 | 65,650 | 0.5% | 171,917 | 1.4% |
| Age Distribution by Sex, 1990 | ||||
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Male
|
Female
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| Number | Percent | Number | Percent | |
| Total Population | 5,694,265 | 47.9% | 6,187,378 | 52.1% |
| 0-4 | 409,132 | 3.4% | 387,926 | 3.3% |
| 5-9 | 404,354 | 3.4% | 383,947 | 3.2% |
| 10-14 | 386,452 | 3.3% | 368,709 | 3.1% |
| 15-19 | 415,738 | 3.5% | 402,320 | 3.4% |
| 20-24 | 430,315 | 3.6% | 432,692 | 3.6% |
| 25-29 | 455,105 | 3.8% | 465,112 | 3.9% |
| 30-34 | 489,019 | 4.1% | 503,220 | 4.2% |
| 35-39 | 456,698 | 3.8% | 466,320 | 3.9% |
| 40-44 | 403,648 | 3.4% | 418,201 | 3.5% |
| 45-49 | 318,489 | 2.7% | 337,594 | 2.8% |
| 50-54 | 266,989 | 2.2% | 290,773 | 2.4% |
| 55-59 | 260,268 | 2.2% | 292,110 | 2.5% |
| 60-64 | 279,697 | 2.4% | 327,709 | 2.8% |
| 65-69 | 260,393 | 2.2% | 330,164 | 2.8% |
| 70-74 | 199,559 | 1.7% | 279,905 | 2.4% |
| 75-79 | 137,547 | 1.2% | 223,759 | 1.9% |
| 80-84 | 75,022 | 0.6% | 150,921 | 1.3% |
| 85 | 45,840 | 0.4% | 125,996 | 1.1% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).