| 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| South Africa | 10,624 | 1,459 | 615 | 12,499 | 92 | 32 | 25 | 66 | 17 | 18 | 210 | 71 | 59 | 40 | 21 | 400 | 1,033 | 931 |
| Botswana | 1,218 | 2,672 | 5 | 853 | 8 | 7 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | 1 | 63 | 3 |
| Lesotho | 2,195 | 660 | 2,488 | 172 | 179 | 516 | 0 | 0 | 0 | 0 | 7 | 464 | 39 | 368 | 3 | 17 | 2 | |
| Eswatini | 1,465 | 10 | 0 | 313 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 64 | 3 | 0 |