| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 6.06711 |
| 2021 | 5.92986 |
| 2020 | 5.84215 |
| 2019 | 5.78716 |
| 2018 | 5.77221 |
| 2017 | 5.79916 |
| 2016 | 5.83115 |
| 2015 | 5.85023 |
| 2014 | 5.87053 |
| 2013 | 5.88118 |
| 2012 | 5.87854 |
| 2011 | 5.88214 |
| 2010 | 5.89368 |
| 2009 | 5.91227 |
| 2008 | 5.93398 |
| 2007 | 5.95344 |
| 2006 | 5.96315 |
| 2005 | 5.95865 |
| 2004 | 5.93323 |
| 2003 | 5.8839 |
| 2002 | 5.81097 |
| 2001 | 5.71991 |
| 2000 | 5.62243 |
| 1999 | 5.52001 |
| 1998 | 5.41365 |
| 1997 | 5.3101 |
| 1996 | 5.21771 |
| 1995 | 5.14343 |
| 1994 | 5.09211 |
| 1993 | 5.06415 |
| 1992 | 5.04885 |
| 1991 | 5.03841 |
| 1990 | 5.03119 |
| 1989 | 4.92424 |
| 1988 | 4.78491 |
| 1987 | 4.74061 |
| 1986 | 4.70785 |
| 1985 | 4.67381 |
| 1984 | 4.63767 |
| 1983 | 4.61731 |
| 1982 | 4.60443 |
| 1981 | 4.60886 |
| 1980 | 4.6259 |
| 1979 | 4.60505 |
| 1978 | 4.60055 |
| 1977 | 4.59907 |
| 1976 | 4.56736 |
| 1975 | 4.54044 |
| 1974 | 4.5164 |
| 1973 | 4.50924 |
| 1972 | 4.51988 |
| 1971 | 4.55061 |
| 1970 | 4.60547 |
| 1969 | 4.68682 |
| 1968 | 4.7989 |
| 1967 | 4.92766 |
| 1966 | 5.04886 |
| 1965 | 5.14618 |
| 1964 | 5.21283 |
| 1963 | 5.24402 |
| 1962 | 5.25019 |
| 1961 | 5.26396 |
| 1960 | 5.30762 |