Y \ X
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
9620
9619
9618
9617
9616
9615
9614
9613
9612
9611
9610
9609
9608
9607
9606
9605
9604
9603
9602
9601
9600