| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 11.5471 |
| 2021 | 11.7569 |
| 2020 | 11.9386 |
| 2019 | 12.1097 |
| 2018 | 12.2728 |
| 2017 | 12.4429 |
| 2016 | 12.6067 |
| 2015 | 12.7555 |
| 2014 | 12.8898 |
| 2013 | 13.0021 |
| 2012 | 13.0951 |
| 2011 | 13.1759 |
| 2010 | 13.2352 |
| 2009 | 13.2541 |
| 2008 | 13.2433 |
| 2007 | 13.228 |
| 2006 | 13.2291 |
| 2005 | 13.2501 |
| 2004 | 13.2884 |
| 2003 | 13.3404 |
| 2002 | 13.39 |
| 2001 | 13.4604 |
| 2000 | 13.6113 |
| 1999 | 13.876 |
| 1998 | 14.2238 |
| 1997 | 14.608 |
| 1996 | 14.9887 |
| 1995 | 15.3368 |
| 1994 | 15.6566 |
| 1993 | 15.9918 |
| 1992 | 16.3901 |
| 1991 | 16.8225 |
| 1990 | 17.245 |
| 1989 | 17.648 |
| 1988 | 18.0246 |
| 1987 | 18.3758 |
| 1986 | 18.7062 |
| 1985 | 19.0114 |
| 1984 | 19.2814 |
| 1983 | 19.5034 |
| 1982 | 19.6579 |
| 1981 | 19.7908 |
| 1980 | 19.9395 |
| 1979 | 20.0684 |
| 1978 | 20.1619 |
| 1977 | 20.2274 |
| 1976 | 20.2936 |
| 1975 | 20.4196 |
| 1974 | 20.6553 |
| 1973 | 21.0163 |
| 1972 | 21.4607 |
| 1971 | 21.8113 |
| 1970 | 21.8712 |
| 1969 | 21.6941 |
| 1968 | 21.4333 |
| 1967 | 21.1218 |
| 1966 | 20.7843 |
| 1965 | 20.4468 |
| 1964 | 20.2929 |
| 1963 | 20.328 |
| 1962 | 20.3762 |
| 1961 | 20.3949 |
| 1960 | 20.338 |