| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 10.1379 |
| 2021 | 10.1626 |
| 2020 | 10.1633 |
| 2019 | 10.1421 |
| 2018 | 10.0981 |
| 2017 | 10.0563 |
| 2016 | 10.0352 |
| 2015 | 10.037 |
| 2014 | 10.0605 |
| 2013 | 10.0997 |
| 2012 | 10.1389 |
| 2011 | 10.189 |
| 2010 | 10.2973 |
| 2009 | 10.4946 |
| 2008 | 10.7575 |
| 2007 | 11.0481 |
| 2006 | 11.3275 |
| 2005 | 11.5644 |
| 2004 | 11.7566 |
| 2003 | 11.9347 |
| 2002 | 12.1381 |
| 2001 | 12.3648 |
| 2000 | 12.5882 |
| 1999 | 12.7901 |
| 1998 | 12.968 |
| 1997 | 13.1267 |
| 1996 | 13.2695 |
| 1995 | 13.3961 |
| 1994 | 13.5045 |
| 1993 | 13.5793 |
| 1992 | 13.5979 |
| 1991 | 13.5378 |
| 1990 | 13.4121 |
| 1989 | 13.2486 |
| 1988 | 13.0503 |
| 1987 | 12.8289 |
| 1986 | 12.6126 |
| 1985 | 12.443 |
| 1984 | 12.346 |
| 1983 | 12.3259 |
| 1982 | 12.3764 |
| 1981 | 12.499 |
| 1980 | 12.661 |
| 1979 | 12.8048 |
| 1978 | 12.9133 |
| 1977 | 12.9775 |
| 1976 | 13.0056 |
| 1975 | 13.0068 |
| 1974 | 12.9922 |
| 1973 | 12.9732 |
| 1972 | 12.9484 |
| 1971 | 12.8986 |
| 1970 | 12.8261 |
| 1969 | 12.742 |
| 1968 | 12.6334 |
| 1967 | 12.5 |
| 1966 | 12.3603 |
| 1965 | 12.2352 |
| 1964 | 12.0831 |
| 1963 | 11.7639 |
| 1962 | 11.3251 |
| 1961 | 10.9273 |
| 1960 | 10.5817 |