| 1951 | 1966 | 1981 | 1996 | 2011 | |
| 1952 | 1967 | 1982 | 1997 | 2012 | |
| 1953 | 1968 | 1983 | 1998 | 2013 | |
| 1954 | 1969 | 1984 | 1999 | 2014 | |
| 1955 | 1970 | 1985 | 2000 | 2015 | |
| 1956 | 1971 | 1986 | 2001 | 2016 | |
| 1957 | 1972 | 1987 | 2002 | 2017 | |
| 1958 | 1973 | 1988 | 2003 | 2018 | |
| 1959 | 1974 | 1989 | 2004 | 2019 | |
| 1960 | 1975 | 1990 | 2005 | 2020 | |
| 1961 | 1976 | 1991 | 2006 | 2021 | |
| 1962 | 1977 | 1992 | 2007 | ||
| 1963 | 1978 | 1993 | 2008 | ||
| 1964 | 1979 | 1994 | 2009 | ||
| 1965 | 1980 | 1995 | 2010 |