| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Botswana | 2.5 | 2.4 | 2.8 | 2.7 | 2.7 | 3.8 | 3.1 | 3.1 | 3.1 | 3.0 | 3.1 | ||||
| Lesotho | 0.7 | 3.1 | |||||||||||||
| Namibia | 1.9 | 1.9 | 1.9 | 2.1 | 2.1 | 2.2 | 2.4 | 2.6 | 2.8 | 3.4 | |||||
| South Africa | 0.7 | 0.8 | 1.0 | 1.1 | 1.1 | 1.2 | 1.1 | 1.0 | |||||||
| Eswatini | 3.2 | 3.3 | 3.4 | 3.5 | 3.7 | 3.8 | 4.1 | 2.5 | 3.2 |