| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 2.99538 |
| 2021 | 3.97411 |
| 2020 | 4.01261 |
| 2019 | 10.2736 |
| 2018 | 2.18639 |
| 2017 | -3.33639 |
| 2016 | 4.15114 |
| 2015 | -0.525991 |
| 2014 | 3.21469 |
| 2013 | 6.04594 |
| 2012 | 6.96609 |
| 2011 | 7.95427 |
| 2010 | -1.58817 |
| 2009 | 9.1056 |
| 2008 | 9.12114 |
| 2007 | 8.50447 |
| 2006 | -3.9566 |
| 2005 | -6.32199 |
| 2004 | 7.16333 |
| 2003 | 1.22003 |
| 2002 | 5.20157 |
| 2001 | -1.44163 |
| 2000 | 0.616597 |
| 1999 | 1.98128 |
| 1998 | 6.62915 |
| 1997 | 9.91277 |
| 1996 | 1.18084 |
| 1995 | 4.21279 |
| 1994 | 5.03588 |
| 1993 | 9.92345 |
| 1992 | 10.9412 |
| 1991 | 3.04013 |
| 1990 | 7.14818 |
| 1989 | 8.80373 |
| 1988 | 17.3201 |
| 1987 | 28.6145 |
| 1986 | 15.5888 |
| 1985 | 12.4109 |
| 1984 | 14.0698 |
| 1983 | 11.1515 |
| 1982 | 11.7807 |
| 1981 | 14.1166 |
| 1980 | 16.8052 |
| 1979 | 6.65896 |
| 1978 | 2.10568 |
| 1977 | 13.4897 |
| 1976 | 20.46 |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |