1950	1951		1960	1961
1952	1953		1962	1963
1954	1955		1964	1965
1956	1957		1966	1967
1958	1959		1968	1969
1970	1971		1980	1981
1972	1973		1982	1983
1974	1975		1984	1985
1976	1977		1986	1987
1978	1979		1988	1989
1990	1991		2000	2001
1992	1993		2002	2003
1994	1995		2004	2005
1996	1997		2006	2007
1998	1999		2008	2009
2010