| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 12.5184 |
| 2021 | 12.6857 |
| 2020 | 12.8666 |
| 2019 | 13.0542 |
| 2018 | 13.2264 |
| 2017 | 13.3718 |
| 2016 | 13.4739 |
| 2015 | 13.5163 |
| 2014 | 13.5032 |
| 2013 | 13.4376 |
| 2012 | 13.3176 |
| 2011 | 13.1605 |
| 2010 | 13.005 |
| 2009 | 12.8717 |
| 2008 | 12.776 |
| 2007 | 12.7466 |
| 2006 | 12.8042 |
| 2005 | 12.9494 |
| 2004 | 13.172 |
| 2003 | 13.4288 |
| 2002 | 13.659 |
| 2001 | 13.8551 |
| 2000 | 14.0714 |
| 1999 | 14.3525 |
| 1998 | 14.7158 |
| 1997 | 15.1733 |
| 1996 | 15.7036 |
| 1995 | 16.2177 |
| 1994 | 16.5288 |
| 1993 | 16.5882 |
| 1992 | 16.4829 |
| 1991 | 16.2331 |
| 1990 | 15.9027 |
| 1989 | 15.9275 |
| 1988 | 16.1467 |
| 1987 | 16.1411 |
| 1986 | 16.1959 |
| 1985 | 16.3686 |
| 1984 | 16.6022 |
| 1983 | 16.9245 |
| 1982 | 17.3537 |
| 1981 | 17.6769 |
| 1980 | 17.8403 |
| 1979 | 18.0268 |
| 1978 | 18.0653 |
| 1977 | 17.9886 |
| 1976 | 17.95 |
| 1975 | 17.8748 |
| 1974 | 17.7949 |
| 1973 | 17.6924 |
| 1972 | 17.5819 |
| 1971 | 17.4717 |
| 1970 | 17.3603 |
| 1969 | 17.2485 |
| 1968 | 17.1324 |
| 1967 | 17.0161 |
| 1966 | 16.8942 |
| 1965 | 16.7632 |
| 1964 | 16.6364 |
| 1963 | 16.5206 |
| 1962 | 16.4243 |
| 1961 | 16.3562 |
| 1960 | 16.3161 |