The World: Population - Age 45-49 (2023) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 211. | British Virgin Islands | 2,913 | 2023 | |
| 5. | Brazil | 15,363,476 | 2023 | |
| 148. | Botswana | 100,739 | 2023 | |
| 116. | Bosnia and Herzegovina | 335,986 | 2023 | |
| 82. | Bolivia | 631,790 | 2023 | |
| 162. | Bhutan | 48,644 | 2023 | |
| 207. | Bermuda | 3,802 | 2023 | |
| 95. | Benin | 499,370 | 2023 | |
| 181. | Belize | 18,001 | 2023 | |
| 77. | Belgium | 653,172 | 2023 | |
| 74. | Belarus | 673,818 | 2023 | |
| 179. | Barbados | 20,475 | 2023 | |
| 6. | Bangladesh | 12,260,407 | 2023 | |
| 145. | Bahrain | 124,873 | 2023 | |
| 79. | Azerbaijan | 644,134 | 2023 | |
| 92. | Austria | 507,443 | 2023 | |
| 47. | Australia | 1,631,814 | 2023 | |
| 190. | Aruba | 7,938 | 2023 | |
| 134. | Armenia | 203,024 | 2023 | |
| 30. | Argentina | 2,939,118 | 2023 | |
| 194. | Antigua and Barbuda | 6,493 | 2023 | |
| 220. | Anguilla | 1,320 | 2023 | |
| 64. | Angola | 885,866 | 2023 | |
| 189. | Andorra | 7,984 | 2023 | |
| 204. | American Samoa | 4,084 | 2023 | |
| 31. | Algeria | 2,827,816 | 2023 | |
| 140. | Albania | 167,866 | 2023 | |
| 51. | Afghanistan | 1,475,703 | 2023 |
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