| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 22.9046 |
| 2020 | 24.0128 |
| 2019 | 22.9743 |
| 2018 | 26.7171 |
| 2017 | 22.4401 |
| 2016 | 23.2882 |
| 2015 | 27.1674 |
| 2014 | 24.6216 |
| 2013 | 25.6315 |
| 2012 | 20.8391 |
| 2011 | 16.9407 |
| 2010 | 18.9607 |
| 2009 | 21.4035 |
| 2008 | 13.9394 |
| 2007 | 10.0201 |
| 2006 | 9.87772 |
| 2005 | 9.04422 |
| 2004 | 9.35762 |
| 2003 | 8.87354 |
| 2002 | 7.63907 |
| 2001 | 7.30689 |
| 2000 | 6.76557 |
| 1999 | 6.02573 |
| 1998 | 5.71331 |
| 1997 | - |
| 1996 | 5.39335 |
| 1995 | 5.06096 |
| 1994 | 5.40507 |
| 1993 | 4.9566 |
| 1992 | - |
| 1991 | 4.14525 |
| 1990 | - |
| 1989 | - |
| 1988 | - |
| 1987 | 2.39398 |
| 1986 | 2.16306 |
| 1985 | 1.82941 |
| 1984 | 1.65828 |
| 1983 | 1.45616 |
| 1982 | 1.38365 |
| 1981 | 1.24347 |
| 1980 | 1.19221 |
| 1979 | 1.00105 |
| 1978 | 0.93952 |
| 1977 | 0.81741 |
| 1976 | 0.74224 |
| 1975 | 0.71198 |
| 1974 | 0.47395 |
| 1973 | 0.43292 |
| 1972 | 0.37698 |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |