| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 0.637557 |
| 2021 | 0.647866 |
| 2020 | 0.660854 |
| 2019 | 0.656889 |
| 2018 | 0.651348 |
| 2017 | 0.645841 |
| 2016 | 0.640544 |
| 2015 | 0.63514 |
| 2014 | 0.629362 |
| 2013 | 0.622287 |
| 2012 | 0.614561 |
| 2011 | 0.60754 |
| 2010 | 0.601956 |
| 2009 | 0.597802 |
| 2008 | 0.594995 |
| 2007 | 0.592196 |
| 2006 | 0.586526 |
| 2005 | 0.576052 |
| 2004 | 0.560909 |
| 2003 | 0.540802 |
| 2002 | 0.517402 |
| 2001 | 0.494574 |
| 2000 | 0.474723 |
| 1999 | 0.457509 |
| 1998 | 0.442373 |
| 1997 | 0.43029 |
| 1996 | 0.42057 |
| 1995 | 0.412881 |
| 1994 | 0.40828 |
| 1993 | 0.407872 |
| 1992 | 0.410969 |
| 1991 | 0.416268 |
| 1990 | 0.423197 |
| 1989 | 0.431947 |
| 1988 | 0.442983 |
| 1987 | 0.45579 |
| 1986 | 0.468521 |
| 1985 | 0.479213 |
| 1984 | 0.486058 |
| 1983 | 0.488748 |
| 1982 | 0.488935 |
| 1981 | 0.49147 |
| 1980 | 0.500482 |
| 1979 | 0.516078 |
| 1978 | 0.538837 |
| 1977 | 0.567201 |
| 1976 | 0.596376 |
| 1975 | 0.622664 |
| 1974 | 0.646439 |
| 1973 | 0.666931 |
| 1972 | 0.681704 |
| 1971 | 0.689211 |
| 1970 | 0.688197 |
| 1969 | 0.681228 |
| 1968 | 0.67084 |
| 1967 | 0.658202 |
| 1966 | 0.64529 |
| 1965 | 0.633148 |
| 1964 | 0.625526 |
| 1963 | 0.622111 |
| 1962 | 0.618556 |
| 1961 | 0.613477 |
| 1960 | 0.605412 |