1968, 1969, 1971, 1976, 1979, 1989, 1995, 1999, 2007, 2010, 2020 1970, 1972, 1975, 1978, 1981, 1986, 1990, 1997, 2002, 2013 1967, 1973, 1977, 1980, 1983, 1987, 1993, 2021* 1984, 1991, 2001, 2009 1988, 1998, 2003 1996, 2008, 2015 1974, 2004, 2017 1994, 2000, 2019 1982, 2006 1985, 2016 1992, 2018 2005 2011 2012 2014 