2015 | 2016 | 2017 | Total (%) | ||
---|---|---|---|---|---|
Africa | 25 (41)a | 47 (51)a | 45 (55)a | 117 (50)b | p < 0.001 |
Asia | 4 (6)a | 2 (2)a | 5 (6)a | 11 (5)b | p = 0.427 |
Eastern Europe | 15 (25)a | 25 (27)a | 13 (16)a | 53 (23)b | p = 0.278 |
Latin America | 17 (28)a | 18 (20)a | 19 (23)a | 54 (23)b | p = 0.355 |
Total | 61 (26)b | 92 (39)b | 82 (35)b | 235 |