1970	1980	1990	2000
1971	1981	1991	2001
1972	1982	1992	2002
1973	1983	1993	2003
1974	1984	1994	2004
1975	1985	1995
1976	1986	1996
1977	1987	1997
1978	1988	1998
1979	1989	1999

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