| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 6.05322 |
| 2021 | 5.92966 |
| 2020 | 5.85602 |
| 2019 | 5.81592 |
| 2018 | 5.81564 |
| 2017 | 5.85777 |
| 2016 | 5.904 |
| 2015 | 5.93426 |
| 2014 | 5.9605 |
| 2013 | 5.97198 |
| 2012 | 5.9649 |
| 2011 | 5.9568 |
| 2010 | 5.94956 |
| 2009 | 5.94688 |
| 2008 | 5.94636 |
| 2007 | 5.94118 |
| 2006 | 5.92431 |
| 2005 | 5.89044 |
| 2004 | 5.83572 |
| 2003 | 5.75915 |
| 2002 | 5.66392 |
| 2001 | 5.55908 |
| 2000 | 5.45331 |
| 1999 | 5.34656 |
| 1998 | 5.23759 |
| 1997 | 5.13166 |
| 1996 | 5.03724 |
| 1995 | 4.9612 |
| 1994 | 4.90751 |
| 1993 | 4.87544 |
| 1992 | 4.85539 |
| 1991 | 4.83764 |
| 1990 | 4.82118 |
| 1989 | 4.67844 |
| 1988 | 4.51718 |
| 1987 | 4.51998 |
| 1986 | 4.56067 |
| 1985 | 4.60935 |
| 1984 | 4.66218 |
| 1983 | 4.71063 |
| 1982 | 4.7212 |
| 1981 | 4.72618 |
| 1980 | 4.73728 |
| 1979 | 4.69361 |
| 1978 | 4.6592 |
| 1977 | 4.62227 |
| 1976 | 4.54373 |
| 1975 | 4.46548 |
| 1974 | 4.38541 |
| 1973 | 4.32165 |
| 1972 | 4.27773 |
| 1971 | 4.25817 |
| 1970 | 4.26925 |
| 1969 | 4.31478 |
| 1968 | 4.40076 |
| 1967 | 4.51683 |
| 1966 | 4.6391 |
| 1965 | 4.75182 |
| 1964 | 4.85198 |
| 1963 | 4.93365 |
| 1962 | 4.993 |
| 1961 | 5.04831 |
| 1960 | 5.11316 |