| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 32.6031 |
| 2021 | 32.9148 |
| 2020 | 33.1709 |
| 2019 | 33.4118 |
| 2018 | 33.6187 |
| 2017 | 33.8296 |
| 2016 | 34.0456 |
| 2015 | 34.2363 |
| 2014 | 34.3825 |
| 2013 | 34.4897 |
| 2012 | 34.5722 |
| 2011 | 34.6717 |
| 2010 | 34.844 |
| 2009 | 35.0966 |
| 2008 | 35.4008 |
| 2007 | 35.7243 |
| 2006 | 36.0556 |
| 2005 | 36.4164 |
| 2004 | 36.8402 |
| 2003 | 37.334 |
| 2002 | 37.8855 |
| 2001 | 38.4642 |
| 2000 | 39.0632 |
| 1999 | 39.7023 |
| 1998 | 40.382 |
| 1997 | 41.1053 |
| 1996 | 41.8519 |
| 1995 | 42.57 |
| 1994 | 43.2294 |
| 1993 | 43.8486 |
| 1992 | 44.4457 |
| 1991 | 44.9827 |
| 1990 | 45.4358 |
| 1989 | 45.8138 |
| 1988 | 46.1054 |
| 1987 | 46.3051 |
| 1986 | 46.4287 |
| 1985 | 46.5126 |
| 1984 | 46.5787 |
| 1983 | 46.6232 |
| 1982 | 46.6396 |
| 1981 | 46.7198 |
| 1980 | 46.9326 |
| 1979 | 47.2175 |
| 1978 | 47.5325 |
| 1977 | 47.8647 |
| 1976 | 48.2265 |
| 1975 | 48.6402 |
| 1974 | 49.1139 |
| 1973 | 49.6381 |
| 1972 | 50.124 |
| 1971 | 50.3493 |
| 1970 | 50.2128 |
| 1969 | 49.8688 |
| 1968 | 49.4563 |
| 1967 | 49.0091 |
| 1966 | 48.5383 |
| 1965 | 48.0577 |
| 1964 | 47.672 |
| 1963 | 47.2239 |
| 1962 | 46.61 |
| 1961 | 45.9877 |
| 1960 | 45.3581 |