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Foreign born population from sickle cell prevalent countries (Western Africa)
| Year | Nigeria | Liberia | Ghana | Sierra Leona | Cape Verde |
|---|---|---|---|---|---|
| 2010 | 205519 | 69911 | 110298 | 32880 | 32084 |
| 2011 | 210470 | 71038 | 116807 | 34161 | 33119 |
| 2012 | 221077 | 71062 | 120785 | 34588 | 34678 |
| 2013 | 228471 | 72627 | 129383 | 35213 | 35213 |
| 2014 | 238599 | 74737 | 136967 | 36584 | 35293 |
| 2015 | 258540 | 77064 | 145218 | 37595 | 36507 |
| 2016 | 277027 | 79974 | 152058 | 37675 | 38036 |
| 2017 | 298532 | 83221 | 158999 | 38257 | 39836 |
