| Year | Count |
|---|---|
| 1913 | 6 |
| 1916 | 6 |
| 1923 | 10 |
| 1925 | 9 |
| 1926 | 12 |
| 1927 | 6 |
| 1928 | 12 |
| 1930 | 8 |
| 1931 | 9 |
| 1939 | 11 |
| 1942 | 5 |
| 1943 | 7 |
| 1944 | 7 |
| 1946 | 7 |
| 1947 | 15 |
| 1948 | 10 |
| 1949 | 8 |
| 1955 | 18 |
| 1956 | 22 |
| 1957 | 22 |
| 1958 | 23 |
| 1959 | 10 |
| 1960 | 12 |
| 1962 | 14 |
| 1963 | 7 |
| 1964 | 10 |
| 1965 | 6 |
| 1966 | 5 |
| 1967 | 10 |
| 1968 | 15 |
| 1969 | 8 |
| 1970 | 5 |
| 1972 | 15 |
| 1973 | 10 |
| 1975 | 8 |
| 1977 | 5 |
| 1978 | 5 |
| 1980 | 12 |
| 1982 | 7 |
| 1984 | 22 |
| 1986 | 6 |
| 1988 | 8 |
| 1989 | 9 |
| 1990 | 17 |
| 1991 | 6 |
| 1992 | 6 |
| 1994 | 7 |
| 1995 | 10 |
| 1997 | 9 |
| 2000 | 7 |
| 2001 | 6 |
| 2018 | 5 |