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
13980
13979
13978
13977
13976
13975
13974
13973
13972
13971
13970
13969
13968
13967
13966
13965
13964
13963
13962
13961
13960