| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 63.7429 |
| 2021 | 63.4928 |
| 2020 | 63.2808 |
| 2019 | 63.1209 |
| 2018 | 62.993 |
| 2017 | 62.8531 |
| 2016 | 62.6993 |
| 2015 | 62.5598 |
| 2014 | 62.4551 |
| 2013 | 62.3654 |
| 2012 | 62.2795 |
| 2011 | 62.176 |
| 2010 | 61.9994 |
| 2009 | 61.7384 |
| 2008 | 61.4205 |
| 2007 | 61.0791 |
| 2006 | 60.7284 |
| 2005 | 60.3509 |
| 2004 | 59.9159 |
| 2003 | 59.4168 |
| 2002 | 58.8647 |
| 2001 | 58.2862 |
| 2000 | 57.6872 |
| 1999 | 57.0523 |
| 1998 | 56.3837 |
| 1997 | 55.6768 |
| 1996 | 54.9471 |
| 1995 | 54.2429 |
| 1994 | 53.5936 |
| 1993 | 52.9793 |
| 1992 | 52.3885 |
| 1991 | 51.8727 |
| 1990 | 51.4578 |
| 1989 | 51.1292 |
| 1988 | 50.8975 |
| 1987 | 50.7637 |
| 1986 | 50.7014 |
| 1985 | 50.6661 |
| 1984 | 50.6366 |
| 1983 | 50.6153 |
| 1982 | 50.6068 |
| 1981 | 50.5142 |
| 1980 | 50.2641 |
| 1979 | 49.9207 |
| 1978 | 49.5244 |
| 1977 | 49.0903 |
| 1976 | 48.6109 |
| 1975 | 48.0673 |
| 1974 | 47.451 |
| 1973 | 46.7711 |
| 1972 | 46.127 |
| 1971 | 45.7796 |
| 1970 | 45.8664 |
| 1969 | 46.2174 |
| 1968 | 46.6636 |
| 1967 | 47.1567 |
| 1966 | 47.6651 |
| 1965 | 48.1619 |
| 1964 | 48.5113 |
| 1963 | 48.8701 |
| 1962 | 49.3815 |
| 1961 | 49.906 |
| 1960 | 50.4566 |