| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 9.461 |
| 2020 | 6.95 |
| 2019 | 6.974 |
| 2018 | 6.922 |
| 2017 | 6.308 |
| 2016 | 6.783 |
| 2015 | 7.435 |
| 2014 | 7.927 |
| 2013 | 8.157 |
| 2012 | 8.671 |
| 2011 | 8.738 |
| 2010 | 8.93 |
| 2009 | 9.719 |
| 2008 | 10.253 |
| 2007 | 10.935 |
| 2006 | 11.883 |
| 2005 | 12.568 |
| 2004 | 13.073 |
| 2003 | 13.409 |
| 2002 | 13.533 |
| 2001 | 13.424 |
| 2000 | 13.128 |
| 1999 | 12.633 |
| 1998 | 12.081 |
| 1997 | 11.508 |
| 1996 | 10.988 |
| 1995 | 10.596 |
| 1994 | 10.025 |
| 1993 | 9.282 |
| 1992 | 8.933 |
| 1991 | 8.423 |
| 1990 | 7.986 |
| 1989 | 7.652 |
| 1988 | 7.6 |
| 1987 | 7.345 |
| 1986 | 7.366 |
| 1985 | 7.468 |
| 1984 | 7.65 |
| 1983 | 7.904 |
| 1982 | 8.208 |
| 1981 | 8.534 |
| 1980 | 8.881 |
| 1979 | 9.231 |
| 1978 | 9.6 |
| 1977 | 9.997 |
| 1976 | 10.431 |
| 1975 | 10.857 |
| 1974 | 11.291 |
| 1973 | 11.739 |
| 1972 | 12.209 |
| 1971 | 12.656 |
| 1970 | 13.033 |
| 1969 | 13.375 |
| 1968 | 13.715 |
| 1967 | 14.032 |
| 1966 | 14.343 |
| 1965 | 14.635 |
| 1964 | 15.031 |
| 1963 | 15.418 |
| 1962 | 15.839 |
| 1961 | 16.301 |
| 1960 | 16.77 |