| District of Columbia |  |
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 | ||||
|
Male
|
Female
|
|||
| Number | Percent | Number | Percent | |
| Total Population | 269,366 | 47.1% | 302,693 | 52.9% |
| 0-4 | 16,483 | 2.9% | 16,053 | 2.8% |
| 5-9 | 17,760 | 3.1% | 17,625 | 3.1% |
| 10-14 | 15,097 | 2.6% | 14,921 | 2.6% |
| 15-19 | 18,016 | 3.1% | 19,851 | 3.5% |
| 20-24 | 23,617 | 4.1% | 28,206 | 4.9% |
| 25-29 | 25,232 | 4.4% | 27,617 | 4.8% |
| 30-34 | 24,522 | 4.3% | 24,391 | 4.3% |
| 35-39 | 23,391 | 4.1% | 22,558 | 3.9% |
| 40-44 | 20,618 | 3.6% | 21,110 | 3.7% |
| 45-49 | 18,745 | 3.3% | 20,652 | 3.6% |
| 50-54 | 16,615 | 2.9% | 19,298 | 3.4% |
| 55-59 | 12,675 | 2.2% | 15,128 | 2.6% |
| 60-64 | 10,052 | 1.8% | 11,928 | 2.1% |
| 65-69 | 8,162 | 1.4% | 10,363 | 1.8% |
| 70-74 | 6,941 | 1.2% | 10,453 | 1.8% |
| 75-79 | 5,602 | 1.0% | 9,374 | 1.6% |
| 80-84 | 3,415 | 0.6% | 6,613 | 1.2% |
| 85 | 2,423 | 0.4% | 6,552 | 1.1% |
| Age Distribution by Sex, 1990 | ||||
|
Male
|
Female
|
|||
| Number | Percent | Number | Percent | |
| Total Population | 282,970 | 46.6% | 323,930 | 53.4% |
| 0-4 | 18,930 | 3.1% | 18,421 | 3.0% |
| 5-9 | 16,299 | 2.7% | 15,698 | 2.6% |
| 10-14 | 14,752 | 2.4% | 14,566 | 2.4% |
| 15-19 | 20,084 | 3.3% | 21,193 | 3.5% |
| 20-24 | 27,842 | 4.6% | 31,865 | 5.3% |
| 25-29 | 30,224 | 5.0% | 32,905 | 5.4% |
| 30-34 | 28,320 | 4.7% | 29,827 | 4.9% |
| 35-39 | 25,123 | 4.1% | 26,276 | 4.3% |
| 40-44 | 20,760 | 3.4% | 23,037 | 3.8% |
| 45-49 | 15,931 | 2.6% | 17,941 | 3.0% |
| 50-54 | 13,344 | 2.2% | 14,815 | 2.4% |
| 55-59 | 11,647 | 1.9% | 13,794 | 2.3% |
| 60-64 | 11,169 | 1.8% | 14,290 | 2.4% |
| 65-69 | 10,314 | 1.7% | 14,527 | 2.4% |
| 70-74 | 7,661 | 1.3% | 12,051 | 2.0% |
| 75-79 | 5,559 | 0.9% | 10,103 | 1.7% |
| 80-84 | 3,034 | 0.5% | 6,751 | 1.1% |
| 85 | 1,977 | 0.3% | 5,870 | 1.0% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).