| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | -0.597978 |
| 2021 | -0.411417 |
| 2020 | -0.324613 |
| 2019 | -0.353515 |
| 2018 | -0.30932 |
| 2017 | -0.269583 |
| 2016 | -0.253349 |
| 2015 | -0.247771 |
| 2014 | -0.224991 |
| 2013 | -0.211377 |
| 2012 | -0.224013 |
| 2011 | -0.201241 |
| 2010 | -0.21883 |
| 2009 | -0.245887 |
| 2008 | -0.304001 |
| 2007 | -0.348999 |
| 2006 | -0.355503 |
| 2005 | -0.310573 |
| 2004 | -0.232398 |
| 2003 | -0.0196686 |
| 2002 | 0.413615 |
| 2001 | 1.24828 |
| 2000 | 1.50299 |
| 1999 | 1.65454 |
| 1998 | 1.74826 |
| 1997 | 1.85274 |
| 1996 | 2.02687 |
| 1995 | 2.26071 |
| 1994 | 2.47404 |
| 1993 | 2.55904 |
| 1992 | 2.62233 |
| 1991 | 2.98353 |
| 1990 | 5.73423 |
| 1989 | 6.06599 |
| 1988 | 3.2286 |
| 1987 | 2.91585 |
| 1986 | 2.77561 |
| 1985 | 2.56323 |
| 1984 | 2.41945 |
| 1983 | 2.36788 |
| 1982 | 1.47555 |
| 1981 | 0.774866 |
| 1980 | 1.54673 |
| 1979 | 1.23418 |
| 1978 | 1.32963 |
| 1977 | 2.28536 |
| 1976 | 2.47708 |
| 1975 | 2.70536 |
| 1974 | 2.64903 |
| 1973 | 2.63919 |
| 1972 | 2.64473 |
| 1971 | 2.59814 |
| 1970 | 2.33813 |
| 1969 | 2.2374 |
| 1968 | 2.17467 |
| 1967 | 2.09902 |
| 1966 | 1.98556 |
| 1965 | 1.89358 |
| 1964 | 1.78212 |
| 1963 | 1.66275 |
| 1962 | 1.5299 |
| 1961 | 1.36814 |
| 1960 | - |