| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 3.17381 |
| 2021 | 3.13147 |
| 2020 | 3.07067 |
| 2019 | 2.99415 |
| 2018 | 2.90982 |
| 2017 | 2.83284 |
| 2016 | 2.76681 |
| 2015 | 2.71305 |
| 2014 | 2.67103 |
| 2013 | 2.63872 |
| 2012 | 2.61369 |
| 2011 | 2.59445 |
| 2010 | 2.57877 |
| 2009 | 2.56202 |
| 2008 | 2.53286 |
| 2007 | 2.49059 |
| 2006 | 2.44531 |
| 2005 | 2.39827 |
| 2004 | 2.35116 |
| 2003 | 2.31542 |
| 2002 | 2.29961 |
| 2001 | 2.2903 |
| 2000 | 2.27016 |
| 1999 | 2.23987 |
| 1998 | 2.20678 |
| 1997 | 2.17297 |
| 1996 | 2.1394 |
| 1995 | 2.10787 |
| 1994 | 2.0791 |
| 1993 | 2.05391 |
| 1992 | 2.04228 |
| 1991 | 2.0543 |
| 1990 | 2.08559 |
| 1989 | 2.147 |
| 1988 | 2.22943 |
| 1987 | 2.30356 |
| 1986 | 2.37171 |
| 1985 | 2.42596 |
| 1984 | 2.46284 |
| 1983 | 2.48052 |
| 1982 | 2.48431 |
| 1981 | 2.48375 |
| 1980 | 2.49292 |
| 1979 | 2.52211 |
| 1978 | 2.55909 |
| 1977 | 2.60718 |
| 1976 | 2.66399 |
| 1975 | 2.71305 |
| 1974 | 2.75745 |
| 1973 | 2.79585 |
| 1972 | 2.826 |
| 1971 | 2.85193 |
| 1970 | 2.87672 |
| 1969 | 2.898 |
| 1968 | 2.91358 |
| 1967 | 2.92785 |
| 1966 | 2.94696 |
| 1965 | 2.97406 |
| 1964 | 3.01069 |
| 1963 | 3.05962 |
| 1962 | 3.11434 |
| 1961 | 3.15729 |
| 1960 | 3.17953 |