Year years 1970 7 1971 7 1972 7 1973 7 1974 7 1975 7 1976 7 1977 7 1978 7 1979 7 1980 7 1981 7 1982 7 1983 7 1984 7 1985 7 1986 7 1987 7 1988 7 1989 7 1990 7 1991 7 1992 7 1993 7 1994 7 1995 7 1996 7 1997 7 1998 7 1999 7 2000 7 2001 7 2002 7 2003 7 2004 7 2005 7 2006 7 2007 7 2008 7 2009 7 2010 7 2011 7 2012 7 2013 7 2014 7 2015 7 2016 7 2017 7 2018 7 2019 7 2020 7 2021 7 2022 7