| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 72.224 |
| 2021 | 71.56 |
| 2020 | 70.877 |
| 2019 | 70.172 |
| 2018 | 69.446 |
| 2017 | 68.7 |
| 2016 | 67.933 |
| 2015 | 67.155 |
| 2014 | 66.368 |
| 2013 | 65.572 |
| 2012 | 64.768 |
| 2011 | 63.865 |
| 2010 | 62.412 |
| 2009 | 60.937 |
| 2008 | 59.444 |
| 2007 | 57.928 |
| 2006 | 56.4 |
| 2005 | 55.944 |
| 2004 | 55.488 |
| 2003 | 55.029 |
| 2002 | 54.57 |
| 2001 | 54.062 |
| 2000 | 53.219 |
| 1999 | 52.372 |
| 1998 | 51.525 |
| 1997 | 50.677 |
| 1996 | 49.83 |
| 1995 | 48.981 |
| 1994 | 48.133 |
| 1993 | 47.286 |
| 1992 | 46.443 |
| 1991 | 45.292 |
| 1990 | 41.933 |
| 1989 | 38.648 |
| 1988 | 35.467 |
| 1987 | 32.401 |
| 1986 | 29.483 |
| 1985 | 26.724 |
| 1984 | 24.139 |
| 1983 | 21.723 |
| 1982 | 19.489 |
| 1981 | 17.552 |
| 1980 | 16.479 |
| 1979 | 15.457 |
| 1978 | 14.489 |
| 1977 | 13.572 |
| 1976 | 12.705 |
| 1975 | 11.884 |
| 1974 | 11.11 |
| 1973 | 10.381 |
| 1972 | 9.695 |
| 1971 | 8.998 |
| 1970 | 7.834 |
| 1969 | 6.81 |
| 1968 | 5.912 |
| 1967 | 5.124 |
| 1966 | 4.437 |
| 1965 | 3.839 |
| 1964 | 3.318 |
| 1963 | 3.171 |
| 1962 | 3.134 |
| 1961 | 3.097 |
| 1960 | 3.06 |