| 年份 | 博茨瓦纳  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.10383 | 
| 2021 | 10.0542 | 
| 2020 | -10.4026 | 
| 2019 | 1.04167 | 
| 2018 | 2.08135 | 
| 2017 | 1.97194 | 
| 2016 | 5.05137 | 
| 2015 | -6.7003 | 
| 2014 | 3.67952 | 
| 2013 | 9.00566 | 
| 2012 | -2.07017 | 
| 2011 | 4.71717 | 
| 2010 | 7.87587 | 
| 2009 | -15.8906 | 
| 2008 | 1.17692 | 
| 2007 | 3.73407 | 
| 2006 | 6.347 | 
| 2005 | 2.69388 | 
| 2004 | 0.925706 | 
| 2003 | 2.80852 | 
| 2002 | 4.10783 | 
| 2001 | -1.73773 | 
| 2000 | -0.104458 | 
| 1999 | 7.34243 | 
| 1998 | -1.76122 | 
| 1997 | 5.83842 | 
| 1996 | 3.25223 | 
| 1995 | 4.2507 | 
| 1994 | 0.78266 | 
| 1993 | -0.981012 | 
| 1992 | 0.011375 | 
| 1991 | 4.41456 | 
| 1990 | 3.60476 | 
| 1989 | 9.55046 | 
| 1988 | 15.5755 | 
| 1987 | 8.11409 | 
| 1986 | 4.45248 | 
| 1985 | 3.40605 | 
| 1984 | 4.74807 | 
| 1983 | 9.12442 | 
| 1982 | 7.75109 | 
| 1981 | 4.163 | 
| 1980 | 6.6084 | 
| 1979 | 6.61258 | 
| 1978 | 8.62204 | 
| 1977 | 6.38429 | 
| 1976 | 5.09006 | 
| 1975 | 3.02923 | 
| 1974 | 3.39809 | 
| 1973 | 15.6473 | 
| 1972 | 21.8322 | 
| 1971 | 23.3438 | 
| 1970 | 16.0312 | 
| 1969 | 14.3225 | 
| 1968 | 9.8209 | 
| 1967 | 5.21659 | 
| 1966 | 5.62625 | 
| 1965 | 4.20147 | 
| 1964 | 4.31803 | 
| 1963 | 3.48774 | 
| 1962 | 4.27554 | 
| 1961 | 4.0035 | 
| 1960 | - |