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
11900
11899
11898
11897
11896
11895
11894
11893
11892
11891
11890
11889
11888
11887
11886
11885
11884
11883
11882
11881
11880