| Oklahoma | 
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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 | 1,695,895 | 49.1% | 1,754,759 | 50.9% |
| 0-4 | 121,605 | 3.5% | 114,748 | 3.3% |
| 5-9 | 125,130 | 3.6% | 119,395 | 3.5% |
| 10-14 | 128,849 | 3.7% | 123,180 | 3.6% |
| 15-19 | 139,122 | 4.0% | 130,251 | 3.8% |
| 20-24 | 127,797 | 3.7% | 119,368 | 3.5% |
| 25-29 | 116,965 | 3.4% | 112,061 | 3.2% |
| 30-34 | 112,508 | 3.3% | 110,113 | 3.2% |
| 35-39 | 129,416 | 3.8% | 129,715 | 3.8% |
| 40-44 | 131,306 | 3.8% | 133,085 | 3.9% |
| 45-49 | 119,074 | 3.5% | 121,731 | 3.5% |
| 50-54 | 103,955 | 3.0% | 109,001 | 3.2% |
| 55-59 | 83,872 | 2.4% | 89,327 | 2.6% |
| 60-64 | 68,185 | 2.0% | 74,945 | 2.2% |
| 65-69 | 59,486 | 1.7% | 69,270 | 2.0% |
| 70-74 | 50,607 | 1.5% | 63,136 | 1.8% |
| 75-79 | 39,283 | 1.1% | 54,785 | 1.6% |
| 80-84 | 22,829 | 0.7% | 39,379 | 1.1% |
| 85 | 15,906 | 0.5% | 41,269 | 1.2% |
| 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 | 1,530,819 | 48.7% | 1,614,766 | 51.3% |
| 0-4 | 115,789 | 3.7% | 110,734 | 3.5% |
| 5-9 | 125,027 | 4.0% | 119,095 | 3.8% |
| 10-14 | 119,525 | 3.8% | 112,367 | 3.6% |
| 15-19 | 120,064 | 3.8% | 113,029 | 3.6% |
| 20-24 | 113,803 | 3.6% | 108,963 | 3.5% |
| 25-29 | 124,659 | 4.0% | 123,950 | 3.9% |
| 30-34 | 129,568 | 4.1% | 131,142 | 4.2% |
| 35-39 | 118,626 | 3.8% | 120,917 | 3.8% |
| 40-44 | 104,575 | 3.3% | 108,123 | 3.4% |
| 45-49 | 85,690 | 2.7% | 89,528 | 2.8% |
| 50-54 | 71,609 | 2.3% | 76,148 | 2.4% |
| 55-59 | 67,347 | 2.1% | 73,867 | 2.3% |
| 60-64 | 64,297 | 2.0% | 72,930 | 2.3% |
| 65-69 | 60,044 | 1.9% | 71,511 | 2.3% |
| 70-74 | 44,507 | 1.4% | 59,073 | 1.9% |
| 75-79 | 32,557 | 1.0% | 52,298 | 1.7% |
| 80-84 | 20,245 | 0.6% | 38,130 | 1.2% |
| 85 | 12,887 | 0.4% | 32,961 | 1.0% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).