Water productivity is calculated as GDP in constant prices of 2010 divided by annual total water withdrawal.
| 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Botswana | 49.6 | 43.8 | 51.9 | 57.7 | 61.5 | 62.3 | 70.4 | 75.7 | 72.0 | 72.1 | 78.3 | 77.1 | 80.3 | 67.1 | 70.9 |
| Lesotho | 20.1 | 33.2 | 38.1 | 45.4 | 47.5 | 50.5 | 51.4 | 52.2 | 53.9 | 55.8 | 54.1 | 53.3 | 52.5 | 48.2 | 49.3 |
| Namibia | 17.0 | 19.1 | 25.3 | 31.2 | 32.8 | 34.4 | 36.4 | 38.6 | 40.2 | 40.2 | 39.8 | 40.2 | 39.9 | 36.7 | 38.0 |
| South Africa | 13.9 | 17.4 | 19.4 | 21.0 | 21.3 | 21.5 | 23.6 | 20.8 | 18.6 | 18.3 | 18.2 | 18.3 | 18.0 | 16.6 | 16.9 |
| इस्वातिनी | 2.1 | 2.3 | 2.7 | 3.2 | 3.2 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | 3.9 | 4.1 | 4.0 | 4.2 |