| Year | Count |
|---|---|
| 1917 | 5 |
| 1920 | 5 |
| 1921 | 5 |
| 1922 | 6 |
| 1923 | 8 |
| 1925 | 9 |
| 1926 | 8 |
| 1927 | 17 |
| 1928 | 9 |
| 1930 | 7 |
| 1939 | 10 |
| 1940 | 7 |
| 1941 | 7 |
| 1942 | 6 |
| 1943 | 9 |
| 1944 | 15 |
| 1946 | 8 |
| 1947 | 33 |
| 1948 | 11 |
| 1949 | 9 |
| 1953 | 6 |
| 1955 | 27 |
| 1956 | 18 |
| 1957 | 24 |
| 1958 | 10 |
| 1959 | 14 |
| 1960 | 12 |
| 1961 | 5 |
| 1963 | 10 |
| 1964 | 12 |
| 1966 | 12 |
| 1967 | 10 |
| 1968 | 12 |
| 1969 | 5 |
| 1978 | 5 |
| 1979 | 6 |
| 1981 | 11 |
| 1985 | 5 |
| 1986 | 8 |
| 1988 | 9 |
| 1989 | 5 |
| 1994 | 5 |
| 1995 | 5 |
| 1996 | 6 |
| 1997 | 5 |
| 2000 | 6 |
| 2007 | 6 |
| 2013 | 12 |
| 2023 | 5 |