| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 27.9981 |
| 2020 | 29.3373 |
| 2019 | 27.4259 |
| 2018 | 31.2529 |
| 2017 | 26.5518 |
| 2016 | 27.483 |
| 2015 | 31.3773 |
| 2014 | 27.2884 |
| 2013 | - |
| 2012 | - |
| 2011 | - |
| 2010 | - |
| 2009 | - |
| 2008 | - |
| 2007 | - |
| 2006 | 8.71927 |
| 2005 | 8.30382 |
| 2004 | 8.56558 |
| 2003 | 8.59231 |
| 2002 | 7.35866 |
| 2001 | 6.7517 |
| 2000 | 6.26802 |
| 1999 | 5.56953 |
| 1998 | 5.21795 |
| 1997 | - |
| 1996 | 4.86851 |
| 1995 | 4.56974 |
| 1994 | 4.31081 |
| 1993 | 4.15096 |
| 1992 | - |
| 1991 | 3.2955 |
| 1990 | - |
| 1989 | - |
| 1988 | - |
| 1987 | 2.10896 |
| 1986 | - |
| 1985 | 1.57473 |
| 1984 | 1.0479 |
| 1983 | 0.96529 |
| 1982 | 0.85846 |
| 1981 | 0.81062 |
| 1980 | 0.78785 |
| 1979 | 0.71527 |
| 1978 | 0.61287 |
| 1977 | 0.54371 |
| 1976 | 0.47633 |
| 1975 | 0.42221 |
| 1974 | 0.28271 |
| 1973 | 0.21828 |
| 1972 | 0.18666 |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |