I can't find whomever it was who'd counted up their wheats with the distribution but here's the distribution of the 185 wheats that I've dug and have organized. They seem to follow the mintage distribution pretty well for the most part.
1911 1
1913 2
1914 1
1915 1
1916 1
1917 2
1919 5
1920 3
1925 3
1926 5
1927 2
1930 1
1934 2
1935 1
1936 3
1937 3
1938 3
1939 3
1940 7
1941 13
1942 8
1944 21
1944D 2
1945 8
1946 10
1946D 1
1946S 1
1947 3
1948 7
1949S 2
1950 4
1950S 1
1951 3
1951D 3
1952 6
1952D 2
1953 4
1953D 4
1954D 1
1955 4
1955D 1
1956 3
1956D 4
1957 3
1957D 12
1958 2
1958D 3
1911 1
1913 2
1914 1
1915 1
1916 1
1917 2
1919 5
1920 3
1925 3
1926 5
1927 2
1930 1
1934 2
1935 1
1936 3
1937 3
1938 3
1939 3
1940 7
1941 13
1942 8
1944 21
1944D 2
1945 8
1946 10
1946D 1
1946S 1
1947 3
1948 7
1949S 2
1950 4
1950S 1
1951 3
1951D 3
1952 6
1952D 2
1953 4
1953D 4
1954D 1
1955 4
1955D 1
1956 3
1956D 4
1957 3
1957D 12
1958 2
1958D 3