| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 5.03999 |
| 2021 | 5.07928 |
| 2020 | 5.09653 |
| 2019 | 5.10273 |
| 2018 | 5.08896 |
| 2017 | 5.05677 |
| 2016 | 5.02344 |
| 2015 | 4.9933 |
| 2014 | 4.9708 |
| 2013 | 4.95532 |
| 2012 | 4.94185 |
| 2011 | 4.92221 |
| 2010 | 4.8897 |
| 2009 | 4.8394 |
| 2008 | 4.76951 |
| 2007 | 4.6805 |
| 2006 | 4.57466 |
| 2005 | 4.45723 |
| 2004 | 4.3358 |
| 2003 | 4.2179 |
| 2002 | 4.11584 |
| 2001 | 4.04094 |
| 2000 | 3.99147 |
| 1999 | 3.96119 |
| 1998 | 3.94327 |
| 1997 | 3.93145 |
| 1996 | 3.92371 |
| 1995 | 3.92151 |
| 1994 | 3.92319 |
| 1993 | 3.92655 |
| 1992 | 3.94279 |
| 1991 | 3.97255 |
| 1990 | 4.00101 |
| 1989 | 3.96327 |
| 1988 | 3.91283 |
| 1987 | 3.90386 |
| 1986 | 3.86008 |
| 1985 | 3.7951 |
| 1984 | 3.72192 |
| 1983 | 3.64472 |
| 1982 | 3.5658 |
| 1981 | 3.517 |
| 1980 | 3.49656 |
| 1979 | 3.46111 |
| 1978 | 3.44834 |
| 1977 | 3.4535 |
| 1976 | 3.45391 |
| 1975 | 3.47534 |
| 1974 | 3.51926 |
| 1973 | 3.59653 |
| 1972 | 3.69802 |
| 1971 | 3.8032 |
| 1970 | 3.89863 |
| 1969 | 3.98104 |
| 1968 | 4.04534 |
| 1967 | 4.09033 |
| 1966 | 4.13126 |
| 1965 | 4.18069 |
| 1964 | 4.233 |
| 1963 | 4.2829 |
| 1962 | 4.33249 |
| 1961 | 4.38034 |
| 1960 | 4.42438 |