1900 April 24

1901 April 20

1902 April 9

1903 April 7

1904 April 29

1905 April 24

1906 April 20

1907 April 24

1908 April 27

1909 April 29

1910 April 1

1911 May 1

1912 April 27

1913 April 20

1914 April 14

1915 April 19

1916 April 20

1917 April 23

1918 April 23

1919 April 16

1920 April 19

1921 April 8

1922 April 17

1923 April 28

1924 April 17

1925 April 14

1926 May 7

1927 April 18

1928 April 29

1929 April 9

1930 April 24

1931 April 20

1932 April 21

1933 April 10

1934 April 21

1935 April 16

1936 April 23

1937 April 24

1938 April 17

1939 May 1

1940 April 29

1941 April 15

1942 April 16

1943 April 29

1944 April 28

1945 March 29

1946 March 27

1947 April 27

1948 April 10

1949 April 12

1950 May 1

1951 April 12

1952 April 20

1953 April 6

1954 April 21

1955 April 13

1956 May 4

1957 April 20

1958 April 26

1959 April 28

1960 April 22

1961 April 22

1962 April 21

1963 April 16

1964 April 17

1965 May 3

1966 April 20

1967 April 18

1968 April 9

1969 April 22

1970 April 30

1971 May 2

1972 May 3

1973 April 17

1974 April 28

1975 May 1

1976 April 16

1977 April 16

1978 April 29

1979 April 21

1980 April 15

1981 April 4

1982 April 27

1983 April 16

1984 April 17

1985 April 23

1986 April 9

1987 April 12

1988 April 16

1989 April 27

1990 April 22

1991 April 15

1992 May 1

1993 April 25

1994 April 23

1995 April 9

1996 May 4

1997 May 1

1998 April 9

1999 April 8

2000 April 7

2001 April 20

2002 April 17

2003 April 23

2004 April 18

2005 April 20

2006 April 16

2007 April 18

2008 April 21

2009 April 18

2010 April 2

2011 April 16

2012 March 23

2013 April 23

2014 April 29