| Maryland |  |
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 | 2,557,794 | 48.3% | 2,738,692 | 51.7% |
| 0-4 | 180,314 | 3.4% | 173,079 | 3.3% |
| 5-9 | 200,138 | 3.8% | 191,180 | 3.6% |
| 10-14 | 200,821 | 3.8% | 191,314 | 3.6% |
| 15-19 | 181,754 | 3.4% | 174,365 | 3.3% |
| 20-24 | 156,486 | 3.0% | 157,643 | 3.0% |
| 25-29 | 166,474 | 3.1% | 176,396 | 3.3% |
| 30-34 | 196,317 | 3.7% | 209,334 | 4.0% |
| 35-39 | 225,189 | 4.3% | 239,599 | 4.5% |
| 40-44 | 218,565 | 4.1% | 232,803 | 4.4% |
| 45-49 | 191,095 | 3.6% | 208,295 | 3.9% |
| 50-54 | 170,998 | 3.2% | 184,644 | 3.5% |
| 55-59 | 128,851 | 2.4% | 139,796 | 2.6% |
| 60-64 | 96,399 | 1.8% | 105,330 | 2.0% |
| 65-69 | 77,449 | 1.5% | 90,793 | 1.7% |
| 70-74 | 66,542 | 1.3% | 86,501 | 1.6% |
| 75-79 | 51,439 | 1.0% | 77,052 | 1.5% |
| 80-84 | 30,253 | 0.6% | 52,376 | 1.0% |
| 85 | 18,710 | 0.4% | 48,192 | 0.9% |
| Age Distribution by Sex, 1990 | ||||
|
Male
|
Female
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| Number | Percent | Number | Percent | |
| Total Population | 2,318,671 | 48.5% | 2,462,797 | 51.5% |
| 0-4 | 183,190 | 3.8% | 174,628 | 3.7% |
| 5-9 | 168,911 | 3.5% | 163,462 | 3.4% |
| 10-14 | 152,048 | 3.2% | 145,116 | 3.0% |
| 15-19 | 158,929 | 3.3% | 151,721 | 3.2% |
| 20-24 | 184,252 | 3.9% | 185,357 | 3.9% |
| 25-29 | 221,623 | 4.6% | 227,573 | 4.8% |
| 30-34 | 221,044 | 4.6% | 229,858 | 4.8% |
| 35-39 | 197,957 | 4.1% | 209,041 | 4.4% |
| 40-44 | 179,771 | 3.8% | 190,237 | 4.0% |
| 45-49 | 143,404 | 3.0% | 149,830 | 3.1% |
| 50-54 | 112,476 | 2.4% | 116,091 | 2.4% |
| 55-59 | 97,768 | 2.0% | 104,402 | 2.2% |
| 60-64 | 91,888 | 1.9% | 103,409 | 2.2% |
| 65-69 | 79,951 | 1.7% | 100,253 | 2.1% |
| 70-74 | 56,867 | 1.2% | 77,420 | 1.6% |
| 75-79 | 36,837 | 0.8% | 59,491 | 1.2% |
| 80-84 | 19,882 | 0.4% | 40,285 | 0.8% |
| 85 | 11,873 | 0.2% | 34,623 | 0.7% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).