| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | 0.843683 |
| 2019 | 0.846166 |
| 2018 | 0.872613 |
| 2017 | 0.900866 |
| 2016 | 0.930578 |
| 2015 | 0.960525 |
| 2014 | 1.15529 |
| 2013 | 1.19003 |
| 2012 | 1.22524 |
| 2011 | 1.2622 |
| 2010 | 1.30297 |
| 2009 | 1.26958 |
| 2008 | 1.38865 |
| 2007 | 1.45072 |
| 2006 | 1.51558 |
| 2005 | 1.55928 |
| 2004 | 1.45878 |
| 2003 | 1.57733 |
| 2002 | 1.62607 |
| 2001 | 1.59915 |
| 2000 | 1.65431 |
| 1999 | 1.70079 |
| 1998 | 1.66365 |
| 1997 | 1.53437 |
| 1996 | 1.58473 |
| 1995 | 1.63951 |
| 1994 | 1.39729 |
| 1993 | 1.44814 |
| 1992 | 1.50247 |
| 1991 | 1.55718 |
| 1990 | 1.38131 |
| 1989 | - |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |