| 年份 | 南非 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 26.4 |
| 2020 | 26.9 |
| 2019 | 27.3 |
| 2018 | 27.8 |
| 2017 | 28.3 |
| 2016 | 28.9 |
| 2015 | 29.4 |
| 2014 | 30.2 |
| 2013 | 31 |
| 2012 | 31.9 |
| 2011 | 33.3 |
| 2010 | 35.7 |
| 2009 | 39.9 |
| 2008 | 44.3 |
| 2007 | 47.6 |
| 2006 | 49.3 |
| 2005 | 50.1 |
| 2004 | 49.8 |
| 2003 | 49.9 |
| 2002 | 49.8 |
| 2001 | 49.4 |
| 2000 | 48.9 |
| 1999 | 48 |
| 1998 | 47.5 |
| 1997 | 47 |
| 1996 | 46.3 |
| 1995 | 45.9 |
| 1994 | 45.8 |
| 1993 | 45.9 |
| 1992 | 46.2 |
| 1991 | 46.8 |
| 1990 | 47.8 |
| 1989 | 49 |
| 1988 | 50.4 |
| 1987 | 52.1 |
| 1986 | 53.9 |
| 1985 | 55.9 |
| 1984 | 58.1 |
| 1983 | 60.4 |
| 1982 | 63 |
| 1981 | 65.7 |
| 1980 | 68.6 |
| 1979 | 71.6 |
| 1978 | 75 |
| 1977 | 78.5 |
| 1976 | 82.2 |
| 1975 | 86 |
| 1974 | 90.1 |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |