| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 3.96901 |
| 2021 | 4.02808 |
| 2020 | 4.03265 |
| 2019 | 3.97587 |
| 2018 | 3.90459 |
| 2017 | 3.83558 |
| 2016 | 3.76828 |
| 2015 | 3.70232 |
| 2014 | 3.63861 |
| 2013 | 3.58102 |
| 2012 | 3.52692 |
| 2011 | 3.47147 |
| 2010 | 3.41597 |
| 2009 | 3.36282 |
| 2008 | 3.31328 |
| 2007 | 3.26735 |
| 2006 | 3.22613 |
| 2005 | 3.19057 |
| 2004 | 3.16151 |
| 2003 | 3.13959 |
| 2002 | 3.12763 |
| 2001 | 3.12667 |
| 2000 | 3.1339 |
| 1999 | 3.14847 |
| 1998 | 3.16918 |
| 1997 | 3.19243 |
| 1996 | 3.21672 |
| 1995 | 3.24411 |
| 1994 | 3.27534 |
| 1993 | 3.30808 |
| 1992 | 3.34022 |
| 1991 | 3.37228 |
| 1990 | 3.41056 |
| 1989 | 3.54495 |
| 1988 | 3.70587 |
| 1987 | 3.77607 |
| 1986 | 3.83483 |
| 1985 | 3.88618 |
| 1984 | 3.92808 |
| 1983 | 3.96356 |
| 1982 | 3.99425 |
| 1981 | 3.98833 |
| 1980 | 3.9551 |
| 1979 | 3.94794 |
| 1978 | 3.92533 |
| 1977 | 3.9057 |
| 1976 | 3.92359 |
| 1975 | 3.95056 |
| 1974 | 3.9891 |
| 1973 | 4.02925 |
| 1972 | 4.07071 |
| 1971 | 4.11039 |
| 1970 | 4.14438 |
| 1969 | 4.17264 |
| 1968 | 4.19264 |
| 1967 | 4.20546 |
| 1966 | 4.2161 |
| 1965 | 4.22671 |
| 1964 | 4.23718 |
| 1963 | 4.24654 |
| 1962 | 4.25605 |
| 1961 | 4.26704 |
| 1960 | 4.27911 |