Digital Commonwealth
- 1933 to 1934 1
- 1935 to 1939 0
- 1940 to 1944 0
- 1945 to 1949 0
- 1950 to 1954 0
- 1955 to 1959 0
- 1960 to 1964 0
- 1965 to 1969 3
- 1970 to 1974 122
- 1975 to 1979 53
- 1980 to 1984 16
- 1985 to 1989 8
- 1990 to 1994 244
- 1995 to 1999 2
- 2000 to 2001 15