| Year | Count |
|---|---|
| 1917 | 5 |
| 1940 | 13 |
| 1941 | 6 |
| 1942 | 21 |
| 1943 | 15 |
| 1944 | 10 |
| 1945 | 12 |
| 1946 | 13 |
| 1947 | 22 |
| 1948 | 9 |
| 1949 | 10 |
| 1950 | 21 |
| 1951 | 9 |
| 1952 | 16 |
| 1953 | 10 |
| 1954 | 10 |
| 1955 | 9 |
| 1956 | 11 |
| 1957 | 22 |
| 1958 | 20 |
| 1959 | 14 |
| 1960 | 12 |
| 1961 | 6 |
| 1962 | 6 |
| 1964 | 8 |
| 1965 | 5 |
| 1967 | 6 |
| 1968 | 5 |
| 1969 | 7 |
| 1970 | 6 |
| 1973 | 5 |
| 1974 | 5 |
| 1984 | 5 |
| 1986 | 5 |
| 1988 | 6 |
| 1997 | 6 |
| 1998 | 5 |
| 2005 | 7 |
| 2008 | 5 |