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
9960
9959
9958
9957
9956
9955
9954
9953
9952
9951
9950
9949
9948
9947
9946
9945
9944
9943
9942
9941
9940