Y \ X
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
9670
9669
9668
9667
9666
9665
9664
9663
9662
9661
9660
9659
9658
9657
9656
9655
9654
9653
9652
9651
9650