The World: Population - Age 45-49 (2019) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 214. | British Virgin Islands | 2,728 | 2019 | |
| 5. | Brazil | 14,482,354 | 2019 | |
| 150. | Botswana | 85,430 | 2019 | |
| 109. | Bosnia and Herzegovina | 355,566 | 2019 | |
| 84. | Bolivia | 536,978 | 2019 | |
| 164. | Bhutan | 40,854 | 2019 | |
| 205. | Bermuda | 4,147 | 2019 | |
| 95. | Benin | 436,043 | 2019 | |
| 181. | Belize | 16,269 | 2019 | |
| 72. | Belgium | 715,681 | 2019 | |
| 73. | Belarus | 656,127 | 2019 | |
| 176. | Barbados | 22,105 | 2019 | |
| 6. | Bangladesh | 10,218,402 | 2019 | |
| 145. | Bahrain | 114,108 | 2019 | |
| 75. | Azerbaijan | 634,628 | 2019 | |
| 78. | Austria | 601,880 | 2019 | |
| 47. | Australia | 1,613,526 | 2019 | |
| 189. | Aruba | 7,806 | 2019 | |
| 132. | Armenia | 194,950 | 2019 | |
| 30. | Argentina | 2,579,529 | 2019 | |
| 195. | Antigua and Barbuda | 6,599 | 2019 | |
| 220. | Anguilla | 1,370 | 2019 | |
| 69. | Angola | 757,894 | 2019 | |
| 187. | Andorra | 8,282 | 2019 | |
| 206. | American Samoa | 4,037 | 2019 | |
| 31. | Algeria | 2,478,490 | 2019 | |
| 136. | Albania | 170,326 | 2019 | |
| 51. | Afghanistan | 1,294,549 | 2019 |
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