| Mississippi | 
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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 | 1,373,554 | 48.3% | 1,471,104 | 51.7% |
| 0-4 | 104,520 | 3.7% | 99,844 | 3.5% |
| 5-9 | 110,509 | 3.9% | 106,411 | 3.7% |
| 10-14 | 111,599 | 3.9% | 107,143 | 3.8% |
| 15-19 | 118,728 | 4.2% | 114,460 | 4.0% |
| 20-24 | 106,793 | 3.8% | 106,154 | 3.7% |
| 25-29 | 94,043 | 3.3% | 98,483 | 3.5% |
| 30-34 | 92,364 | 3.2% | 96,908 | 3.4% |
| 35-39 | 103,065 | 3.6% | 109,244 | 3.8% |
| 40-44 | 103,430 | 3.6% | 109,633 | 3.9% |
| 45-49 | 93,039 | 3.3% | 99,072 | 3.5% |
| 50-54 | 82,974 | 2.9% | 86,896 | 3.1% |
| 55-59 | 63,298 | 2.2% | 68,904 | 2.4% |
| 60-64 | 53,302 | 1.9% | 60,319 | 2.1% |
| 65-69 | 44,174 | 1.6% | 54,005 | 1.9% |
| 70-74 | 37,356 | 1.3% | 50,175 | 1.8% |
| 75-79 | 26,611 | 0.9% | 41,947 | 1.5% |
| 80-84 | 15,970 | 0.6% | 30,394 | 1.1% |
| 85 | 11,779 | 0.4% | 31,112 | 1.1% |
| 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 | 1,230,617 | 47.8% | 1,342,599 | 52.2% |
| 0-4 | 99,515 | 3.9% | 95,850 | 3.7% |
| 5-9 | 108,214 | 4.2% | 103,704 | 4.0% |
| 10-14 | 109,073 | 4.2% | 104,232 | 4.1% |
| 15-19 | 112,919 | 4.4% | 109,960 | 4.3% |
| 20-24 | 96,793 | 3.8% | 99,847 | 3.9% |
| 25-29 | 95,405 | 3.7% | 102,335 | 4.0% |
| 30-34 | 96,955 | 3.8% | 105,325 | 4.1% |
| 35-39 | 89,441 | 3.5% | 95,961 | 3.7% |
| 40-44 | 79,776 | 3.1% | 84,386 | 3.3% |
| 45-49 | 63,480 | 2.5% | 68,147 | 2.6% |
| 50-54 | 54,999 | 2.1% | 61,119 | 2.4% |
| 55-59 | 49,891 | 1.9% | 57,893 | 2.2% |
| 60-64 | 48,233 | 1.9% | 58,479 | 2.3% |
| 65-69 | 43,303 | 1.7% | 56,474 | 2.2% |
| 70-74 | 33,221 | 1.3% | 47,151 | 1.8% |
| 75-79 | 24,748 | 1.0% | 40,641 | 1.6% |
| 80-84 | 15,275 | 0.6% | 28,136 | 1.1% |
| 85 | 9,376 | 0.4% | 22,959 | 0.9% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).