The World: Population - Age 45-49 (2017) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 215. | British Virgin Islands | 2,710 | 2017 | |
| 5. | Brazil | 14,150,138 | 2017 | |
| 150. | Botswana | 81,397 | 2017 | |
| 106. | Bosnia and Herzegovina | 358,149 | 2017 | |
| 84. | Bolivia | 494,572 | 2017 | |
| 166. | Bhutan | 37,888 | 2017 | |
| 204. | Bermuda | 4,431 | 2017 | |
| 97. | Benin | 396,450 | 2017 | |
| 181. | Belize | 16,322 | 2017 | |
| 68. | Belgium | 737,364 | 2017 | |
| 75. | Belarus | 632,979 | 2017 | |
| 176. | Barbados | 22,975 | 2017 | |
| 8. | Bangladesh | 9,003,428 | 2017 | |
| 146. | Bahrain | 105,977 | 2017 | |
| 74. | Azerbaijan | 645,457 | 2017 | |
| 73. | Austria | 661,120 | 2017 | |
| 46. | Australia | 1,581,639 | 2017 | |
| 189. | Aruba | 7,644 | 2017 | |
| 132. | Armenia | 191,037 | 2017 | |
| 29. | Argentina | 2,444,262 | 2017 | |
| 194. | Antigua and Barbuda | 6,797 | 2017 | |
| 220. | Anguilla | 1,386 | 2017 | |
| 70. | Angola | 705,523 | 2017 | |
| 187. | Andorra | 8,217 | 2017 | |
| 206. | American Samoa | 4,150 | 2017 | |
| 31. | Algeria | 2,353,210 | 2017 | |
| 135. | Albania | 171,288 | 2017 | |
| 52. | Afghanistan | 1,214,782 | 2017 |
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