Y \ X
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
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
6880
6879
6878
6877
6876
6875
6874
6873
6872
6871
6870
6869
6868
6867
6866
6865
6864
6863
6862
6861
6860