| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 10.9716 |
| 2021 | 11.1633 |
| 2020 | 11.333 |
| 2019 | 11.489 |
| 2018 | 11.6328 |
| 2017 | 11.7813 |
| 2016 | 11.9247 |
| 2015 | 12.0546 |
| 2014 | 12.1732 |
| 2013 | 12.2733 |
| 2012 | 12.3519 |
| 2011 | 12.4149 |
| 2010 | 12.4523 |
| 2009 | 12.4453 |
| 2008 | 12.4061 |
| 2007 | 12.3594 |
| 2006 | 12.3274 |
| 2005 | 12.3177 |
| 2004 | 12.3264 |
| 2003 | 12.3464 |
| 2002 | 12.3638 |
| 2001 | 12.3991 |
| 2000 | 12.5066 |
| 1999 | 12.7178 |
| 1998 | 13.0042 |
| 1997 | 13.3209 |
| 1996 | 13.6329 |
| 1995 | 13.918 |
| 1994 | 14.1774 |
| 1993 | 14.4467 |
| 1992 | 14.7717 |
| 1991 | 15.164 |
| 1990 | 15.587 |
| 1989 | 15.9977 |
| 1988 | 16.3892 |
| 1987 | 16.7602 |
| 1986 | 17.1081 |
| 1985 | 17.4222 |
| 1984 | 17.6916 |
| 1983 | 17.9054 |
| 1982 | 18.0532 |
| 1981 | 18.1248 |
| 1980 | 18.1327 |
| 1979 | 18.0926 |
| 1978 | 17.9992 |
| 1977 | 17.8661 |
| 1976 | 17.7265 |
| 1975 | 17.6364 |
| 1974 | 17.6336 |
| 1973 | 17.7206 |
| 1972 | 17.8795 |
| 1971 | 18.0503 |
| 1970 | 18.1792 |
| 1969 | 18.2564 |
| 1968 | 18.2888 |
| 1967 | 18.276 |
| 1966 | 18.2373 |
| 1965 | 18.1934 |
| 1964 | 18.1987 |
| 1963 | 18.2636 |
| 1962 | 18.3445 |
| 1961 | 18.4067 |
| 1960 | 18.4096 |