| 4-5 Population Grouped by Age and Sex | ||||||||
| Data in the table are the tabulation data of the 5th national population census in 2000. | ||||||||
| Age Groups | Population | Percentage to Total Population (%) | Sex Ratio | |||||
| Total | Male | Female | Total | Male | Female | (Female=100) | ||
| Total | 1242612226 | 640275969 | 602336257 | 100.00 | 51.53 | 48.47 | 106.30 | |
| 0-4 | 68978374 | 37648694 | 31329680 | 5.55 | 3.03 | 2.52 | 120.17 | |
| 5-9 | 90152587 | 48303208 | 41849379 | 7.26 | 3.89 | 3.37 | 115.42 | |
| 10-14 | 125396633 | 65344739 | 60051894 | 10.09 | 5.26 | 4.83 | 108.81 | |
| 15-19 | 103031165 | 52878170 | 50152995 | 8.29 | 4.26 | 4.04 | 105.43 | |
| 20-24 | 94573174 | 47937766 | 46635408 | 7.61 | 3.86 | 3.75 | 102.79 | |
| 25-29 | 117602265 | 60230758 | 57371507 | 9.46 | 4.85 | 4.62 | 104.98 | |
| 30-34 | 127314298 | 65360456 | 61953842 | 10.25 | 5.26 | 4.99 | 105.50 | |
| 35-39 | 109147295 | 56141391 | 53005904 | 8.78 | 4.52 | 4.27 | 105.92 | |
| 40-44 | 81242945 | 42243187 | 38999758 | 6.54 | 3.40 | 3.14 | 108.32 | |
| 45-49 | 85521045 | 43939603 | 41581442 | 6.88 | 3.54 | 3.35 | 105.67 | |
| 50-54 | 63304200 | 32804125 | 30500075 | 5.09 | 2.64 | 2.45 | 107.55 | |
| 55-59 | 46370375 | 24061506 | 22308869 | 3.73 | 1.94 | 1.80 | 107.86 | |
| 60-64 | 41703848 | 21674478 | 20029370 | 3.36 | 1.74 | 1.61 | 108.21 | |
| 65-69 | 34780460 | 17549348 | 17231112 | 2.80 | 1.41 | 1.39 | 101.85 | |
| 70-74 | 25574149 | 12436154 | 13137995 | 2.06 | 1.00 | 1.06 | 94.66 | |
| 75-79 | 15928330 | 7175811 | 8752519 | 1.28 | 0.58 | 0.70 | 81.99 | |
| 80-84 | 7989158 | 3203868 | 4785290 | 0.64 | 0.26 | 0.39 | 66.95 | |
| 85-89 | 3030698 | 1056941 | 1973757 | 0.24 | 0.09 | 0.16 | 53.55 | |
| 90-94 | 783594 | 229758 | 553836 | 0.06 | 0.02 | 0.04 | 41.48 | |
| 95-99 | 169756 | 51373 | 118383 | 0.01 | 0.01 | 43.40 | ||
| 100 and Over | 17877 | 4635 | 13242 | 35.00 | ||||