| 年份 | 博茨瓦纳 |
|---|---|
| 2023 | - |
| 2022 | 1.47302 |
| 2021 | -4.9371 |
| 2020 | -15.0826 |
| 2019 | -8.91735 |
| 2018 | 1.00118 |
| 2017 | 3.91613 |
| 2016 | 8.75802 |
| 2015 | -6.7191 |
| 2014 | 3.06839 |
| 2013 | -3.02352 |
| 2012 | -15.6452 |
| 2011 | -10.4887 |
| 2010 | -10.3503 |
| 2009 | -16.8135 |
| 2008 | -5.11441 |
| 2007 | 14.4634 |
| 2006 | 16.9492 |
| 2005 | 17.3418 |
| 2004 | 8.22975 |
| 2003 | 11.8197 |
| 2002 | 12.4791 |
| 2001 | 9.79015 |
| 2000 | 11.7389 |
| 1999 | 11.4655 |
| 1998 | -3.2627 |
| 1997 | 13.1571 |
| 1996 | 16.7013 |
| 1995 | 7.07782 |
| 1994 | 7.46419 |
| 1993 | 7.98339 |
| 1992 | 6.60787 |
| 1991 | 6.50064 |
| 1990 | 5.26349 |
| 1989 | 13.0883 |
| 1988 | 26.5923 |
| 1987 | 26.6874 |
| 1986 | 19.2021 |
| 1985 | 15.0593 |
| 1984 | 2.84907 |
| 1983 | -0.482171 |
| 1982 | -14.7122 |
| 1981 | -21.8253 |
| 1980 | -13.3831 |
| 1979 | -11.1269 |
| 1978 | -16.4639 |
| 1977 | -18.4089 |
| 1976 | -15.9351 |
| 1975 | -20.198 |
| 1974 | -23.8519 |
| 1973 | -23.1337 |
| 1972 | -23.1707 |
| 1971 | -28.4141 |
| 1970 | -36.2582 |
| 1969 | -29.793 |
| 1968 | -39.8947 |
| 1967 | -26.1596 |
| 1966 | -21.6802 |
| 1965 | -18.9024 |
| 1964 | -19.7657 |
| 1963 | -18.3509 |
| 1962 | -16.913 |
| 1961 | -15.3092 |
| 1960 | -13.3683 |