| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 4.74555 |
| 2021 | 2.30482 |
| 2020 | 2.33515 |
| 2019 | 3.14301 |
| 2018 | 5.36506 |
| 2017 | 1.43739 |
| 2016 | 2.57091 |
| 2015 | 3.56401 |
| 2014 | 2.07308 |
| 2013 | 8.12907 |
| 2012 | 8.45282 |
| 2011 | 5.16292 |
| 2010 | 7.37413 |
| 2009 | 5.05522 |
| 2008 | 11.4275 |
| 2007 | 8.84712 |
| 2006 | 17.2481 |
| 2005 | 10.7755 |
| 2004 | 3.07582 |
| 2003 | 1.33197 |
| 2002 | 4.95317 |
| 2001 | -4.46238 |
| 2000 | -1.29962 |
| 1999 | 0.0393089 |
| 1998 | 2.08671 |
| 1997 | 13.4508 |
| 1996 | 5.42657 |
| 1995 | 16.9407 |
| 1994 | 2.35174 |
| 1993 | -2.35012 |
| 1992 | -1.28217 |
| 1991 | 9.96414 |
| 1990 | 22.3978 |
| 1989 | 25.1584 |
| 1988 | 8.97602 |
| 1987 | 0.193001 |
| 1986 | 6.92588 |
| 1985 | 17.2435 |
| 1984 | 7.28395 |
| 1983 | -6.66824 |
| 1982 | -4.79579 |
| 1981 | -1.89845 |
| 1980 | 1.96961 |
| 1979 | 12.4648 |
| 1978 | 12.7238 |
| 1977 | 8.78119 |
| 1976 | 10.6004 |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |