| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.458772 |
| 2020 | 0.458772 |
| 2019 | 0.458772 |
| 2018 | 0.458066 |
| 2017 | 0.458066 |
| 2016 | 0.458066 |
| 2015 | 0.458066 |
| 2014 | 0.709332 |
| 2013 | 0.494062 |
| 2012 | 0.502885 |
| 2011 | 0.571701 |
| 2010 | 0.457008 |
| 2009 | 0.557585 |
| 2008 | 0.492298 |
| 2007 | 0.321141 |
| 2006 | 0.354666 |
| 2005 | 0.376723 |
| 2004 | 0.398779 |
| 2003 | 0.344079 |
| 2002 | 0.432305 |
| 2001 | 0.352902 |
| 2000 | 0.617578 |
| 1999 | 0.423482 |
| 1998 | 0.405837 |
| 1997 | 0.529353 |
| 1996 | 0.608755 |
| 1995 | 0.608755 |
| 1994 | 0.696981 |
| 1993 | 0.617578 |
| 1992 | 0.441127 |
| 1991 | 0.529353 |
| 1990 | 0.741094 |
| 1989 | 0.730507 |
| 1988 | 0.721684 |
| 1987 | 0.721684 |
| 1986 | 0.718155 |
| 1985 | 0.718155 |
| 1984 | 0.714626 |
| 1983 | 0.714626 |
| 1982 | 0.714626 |
| 1981 | 0.711097 |
| 1980 | 0.711097 |
| 1979 | 0.711097 |
| 1978 | 0.707568 |
| 1977 | 0.707568 |
| 1976 | 0.707568 |
| 1975 | 0.707568 |
| 1974 | 0.707568 |
| 1973 | 0.707568 |
| 1972 | 0.707568 |
| 1971 | 0.705803 |
| 1970 | 0.705803 |
| 1969 | 0.705803 |
| 1968 | 0.705803 |
| 1967 | 0.705803 |
| 1966 | 0.705803 |
| 1965 | 0.705803 |
| 1964 | 0.704039 |
| 1963 | 0.704039 |
| 1962 | 0.704039 |
| 1961 | 0.704039 |
| 1960 | - |