| Delaware |  |
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 | 380,541 | 48.6% | 403,059 | 51.4% |
| 0-4 | 26,278 | 3.4% | 25,253 | 3.2% |
| 5-9 | 28,712 | 3.7% | 27,101 | 3.5% |
| 10-14 | 28,302 | 3.6% | 26,972 | 3.4% |
| 15-19 | 27,944 | 3.6% | 27,688 | 3.5% |
| 20-24 | 25,616 | 3.3% | 26,049 | 3.3% |
| 25-29 | 25,436 | 3.2% | 25,783 | 3.3% |
| 30-34 | 28,433 | 3.6% | 29,188 | 3.7% |
| 35-39 | 31,757 | 4.1% | 32,897 | 4.2% |
| 40-44 | 30,928 | 3.9% | 32,019 | 4.1% |
| 45-49 | 26,500 | 3.4% | 28,275 | 3.6% |
| 50-54 | 23,779 | 3.0% | 25,445 | 3.2% |
| 55-59 | 18,770 | 2.4% | 20,550 | 2.6% |
| 60-64 | 15,220 | 1.9% | 16,979 | 2.2% |
| 65-69 | 14,081 | 1.8% | 15,871 | 2.0% |
| 70-74 | 11,938 | 1.5% | 14,525 | 1.9% |
| 75-79 | 8,767 | 1.1% | 12,481 | 1.6% |
| 80-84 | 5,130 | 0.7% | 8,384 | 1.1% |
| 85 | 2,950 | 0.4% | 7,599 | 1.0% |
| Age Distribution by Sex, 1990 | ||||
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Male
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Female
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| Number | Percent | Number | Percent | |
| Total Population | 322,968 | 48.5% | 343,200 | 51.5% |
| 0-4 | 25,034 | 3.8% | 23,790 | 3.6% |
| 5-9 | 24,034 | 3.6% | 22,915 | 3.4% |
| 10-14 | 21,995 | 3.3% | 21,060 | 3.2% |
| 15-19 | 23,086 | 3.5% | 23,220 | 3.5% |
| 20-24 | 26,913 | 4.0% | 27,527 | 4.1% |
| 25-29 | 29,483 | 4.4% | 29,803 | 4.5% |
| 30-34 | 29,575 | 4.4% | 30,254 | 4.5% |
| 35-39 | 25,735 | 3.9% | 26,548 | 4.0% |
| 40-44 | 22,831 | 3.4% | 23,752 | 3.6% |
| 45-49 | 18,211 | 2.7% | 19,277 | 2.9% |
| 50-54 | 14,810 | 2.2% | 15,816 | 2.4% |
| 55-59 | 14,337 | 2.2% | 15,524 | 2.3% |
| 60-64 | 14,137 | 2.1% | 15,766 | 2.4% |
| 65-69 | 12,877 | 1.9% | 15,597 | 2.3% |
| 70-74 | 9,228 | 1.4% | 11,894 | 1.8% |
| 75-79 | 5,837 | 0.9% | 8,977 | 1.3% |
| 80-84 | 3,066 | 0.5% | 6,117 | 0.9% |
| 85 | 1,779 | 0.3% | 5,363 | 0.8% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).