| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 56.8802 |
| 2021 | 57.4983 |
| 2020 | 58.026 |
| 2019 | 58.4262 |
| 2018 | 58.7479 |
| 2017 | 59.1012 |
| 2016 | 59.4916 |
| 2015 | 59.847 |
| 2014 | 60.1152 |
| 2013 | 60.3452 |
| 2012 | 60.5665 |
| 2011 | 60.8338 |
| 2010 | 61.292 |
| 2009 | 61.9737 |
| 2008 | 62.8121 |
| 2007 | 63.7223 |
| 2006 | 64.6676 |
| 2005 | 65.6977 |
| 2004 | 66.9007 |
| 2003 | 68.3027 |
| 2002 | 69.8812 |
| 2001 | 71.5673 |
| 2000 | 73.3487 |
| 1999 | 75.278 |
| 1998 | 77.3563 |
| 1997 | 79.6079 |
| 1996 | 81.993 |
| 1995 | 84.3557 |
| 1994 | 86.5894 |
| 1993 | 88.7529 |
| 1992 | 90.8814 |
| 1991 | 92.7798 |
| 1990 | 94.3339 |
| 1989 | 95.5829 |
| 1988 | 96.4734 |
| 1987 | 96.9911 |
| 1986 | 97.2332 |
| 1985 | 97.3706 |
| 1984 | 97.4855 |
| 1983 | 97.5688 |
| 1982 | 97.6021 |
| 1981 | 97.9643 |
| 1980 | 98.9491 |
| 1979 | 100.318 |
| 1978 | 101.92 |
| 1977 | 103.706 |
| 1976 | 105.715 |
| 1975 | 108.042 |
| 1974 | 110.743 |
| 1973 | 113.807 |
| 1972 | 116.793 |
| 1971 | 118.438 |
| 1970 | 118.025 |
| 1969 | 116.368 |
| 1968 | 114.3 |
| 1967 | 112.059 |
| 1966 | 109.797 |
| 1965 | 107.633 |
| 1964 | 106.137 |
| 1963 | 104.624 |
| 1962 | 102.505 |
| 1961 | 100.377 |
| 1960 | 98.1903 |