| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.500235 |
| 2020 | 0.276198 |
| 2019 | 0.32658 |
| 2018 | 0.514158 |
| 2017 | 0.412849 |
| 2016 | 0.279219 |
| 2015 | 0.307384 |
| 2014 | 0.312542 |
| 2013 | 0.406617 |
| 2012 | 0.508801 |
| 2011 | 0.368467 |
| 2010 | 0.430761 |
| 2009 | 0.220914 |
| 2008 | 0.764906 |
| 2007 | 0.328004 |
| 2006 | 0.285887 |
| 2005 | 0.268374 |
| 2004 | 0.346717 |
| 2003 | 0.121832 |
| 2002 | 0.170688 |
| 2001 | 0.252154 |
| 2000 | 0.139275 |
| 1999 | 0.101001 |
| 1998 | 0.16677 |
| 1997 | 0.184309 |
| 1996 | 0.233807 |
| 1995 | 0.323436 |
| 1994 | 0.250344 |
| 1993 | 0.240961 |
| 1992 | 0.339114 |
| 1991 | 0.347958 |
| 1990 | 0.376738 |
| 1989 | 0.364176 |
| 1988 | 0.328481 |
| 1987 | 0.278122 |
| 1986 | 0.546132 |
| 1985 | 0.786991 |
| 1984 | 0.566676 |
| 1983 | 0.753962 |
| 1982 | 1.47704 |
| 1981 | 1.236 |
| 1980 | 0.820164 |
| 1979 | 0.718165 |
| 1978 | 0.85235 |
| 1977 | 1.09994 |
| 1976 | 0.973134 |
| 1975 | 0.319312 |
| 1974 | 0.0887536 |
| 1973 | 0.0388515 |
| 1972 | 0.0186618 |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |