| Washington |  |
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
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Female
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| Number | Percent | Number | Percent | |
| Total Population | 2,934,300 | 49.8% | 2,959,821 | 50.2% |
| 0-4 | 202,065 | 3.4% | 192,241 | 3.3% |
| 5-9 | 218,501 | 3.7% | 207,408 | 3.5% |
| 10-14 | 222,937 | 3.8% | 211,899 | 3.6% |
| 15-19 | 220,412 | 3.7% | 207,556 | 3.5% |
| 20-24 | 200,812 | 3.4% | 189,373 | 3.2% |
| 25-29 | 206,789 | 3.5% | 196,863 | 3.3% |
| 30-34 | 223,414 | 3.8% | 214,064 | 3.6% |
| 35-39 | 244,033 | 4.1% | 239,917 | 4.1% |
| 40-44 | 246,265 | 4.2% | 244,872 | 4.2% |
| 45-49 | 225,509 | 3.8% | 228,714 | 3.9% |
| 50-54 | 195,058 | 3.3% | 196,691 | 3.3% |
| 55-59 | 142,506 | 2.4% | 142,999 | 2.4% |
| 60-64 | 104,014 | 1.8% | 107,061 | 1.8% |
| 65-69 | 84,294 | 1.4% | 91,931 | 1.6% |
| 70-74 | 72,628 | 1.2% | 88,313 | 1.5% |
| 75-79 | 60,153 | 1.0% | 82,555 | 1.4% |
| 80-84 | 38,693 | 0.7% | 59,496 | 1.0% |
| 85 | 26,217 | 0.4% | 57,868 | 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 | 2,413,747 | 49.6% | 2,452,945 | 50.4% |
| 0-4 | 187,838 | 3.9% | 178,942 | 3.7% |
| 5-9 | 190,090 | 3.9% | 181,003 | 3.7% |
| 10-14 | 173,528 | 3.6% | 164,134 | 3.4% |
| 15-19 | 165,818 | 3.4% | 156,893 | 3.2% |
| 20-24 | 181,447 | 3.7% | 170,233 | 3.5% |
| 25-29 | 209,117 | 4.3% | 202,705 | 4.2% |
| 30-34 | 222,509 | 4.6% | 220,857 | 4.5% |
| 35-39 | 213,981 | 4.4% | 213,709 | 4.4% |
| 40-44 | 188,660 | 3.9% | 187,413 | 3.9% |
| 45-49 | 143,983 | 3.0% | 140,691 | 2.9% |
| 50-54 | 109,360 | 2.2% | 107,509 | 2.2% |
| 55-59 | 94,749 | 1.9% | 96,853 | 2.0% |
| 60-64 | 90,368 | 1.9% | 99,014 | 2.0% |
| 65-69 | 86,117 | 1.8% | 100,562 | 2.1% |
| 70-74 | 67,230 | 1.4% | 82,125 | 1.7% |
| 75-79 | 46,832 | 1.0% | 65,616 | 1.3% |
| 80-84 | 25,965 | 0.5% | 44,540 | 0.9% |
| 85 | 16,155 | 0.3% | 40,146 | 0.8% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).