| 年份 | 南非 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.202047 |
| 2020 | 0.204075 |
| 2019 | 0.206586 |
| 2018 | 0.209279 |
| 2017 | 0.21186 |
| 2016 | 0.212682 |
| 2015 | 0.214759 |
| 2014 | 0.21926 |
| 2013 | 0.222744 |
| 2012 | 0.225797 |
| 2011 | 0.229448 |
| 2010 | 0.24202 |
| 2009 | 0.247407 |
| 2008 | 0.253135 |
| 2007 | 0.25202 |
| 2006 | 0.254588 |
| 2005 | 0.268783 |
| 2004 | 0.27391 |
| 2003 | 0.28272 |
| 2002 | 0.287444 |
| 2001 | 0.289754 |
| 2000 | 0.295045 |
| 1999 | 0.296778 |
| 1998 | 0.298786 |
| 1997 | 0.302528 |
| 1996 | 0.305632 |
| 1995 | 0.306915 |
| 1994 | 0.310853 |
| 1993 | 0.315717 |
| 1992 | 0.3152 |
| 1991 | 0.315319 |
| 1990 | 0.320982 |
| 1989 | 0.328431 |
| 1988 | 0.336954 |
| 1987 | 0.347459 |
| 1986 | 0.361261 |
| 1985 | 0.366042 |
| 1984 | 0.377042 |
| 1983 | 0.387727 |
| 1982 | 0.39826 |
| 1981 | 0.408302 |
| 1980 | 0.418653 |
| 1979 | 0.429522 |
| 1978 | 0.440783 |
| 1977 | 0.452503 |
| 1976 | 0.464458 |
| 1975 | 0.476764 |
| 1974 | 0.489731 |
| 1973 | 0.503312 |
| 1972 | 0.517459 |
| 1971 | 0.532055 |
| 1970 | 0.547426 |
| 1969 | 0.563761 |
| 1968 | 0.58084 |
| 1967 | 0.598608 |
| 1966 | 0.616935 |
| 1965 | 0.635841 |
| 1964 | 0.653117 |
| 1963 | 0.670649 |
| 1962 | 0.688448 |
| 1961 | 0.70632 |
| 1960 | - |