| Year | Count |
|---|---|
| 1918 | 10 |
| 1927 | 15 |
| 1929 | 24 |
| 1930 | 15 |
| 1932 | 6 |
| 1939 | 25 |
| 1940 | 10 |
| 1941 | 19 |
| 1942 | 28 |
| 1943 | 34 |
| 1944 | 27 |
| 1945 | 35 |
| 1946 | 54 |
| 1947 | 79 |
| 1948 | 52 |
| 1949 | 60 |
| 1950 | 89 |
| 1951 | 62 |
| 1952 | 56 |
| 1953 | 52 |
| 1954 | 44 |
| 1955 | 48 |
| 1956 | 51 |
| 1957 | 62 |
| 1958 | 60 |
| 1959 | 58 |
| 1960 | 77 |
| 1961 | 44 |
| 1962 | 31 |
| 1963 | 32 |
| 1964 | 36 |
| 1965 | 27 |
| 1966 | 16 |
| 1967 | 20 |
| 1968 | 29 |
| 1969 | 21 |
| 1970 | 7 |
| 1971 | 12 |
| 1972 | 10 |
| 1977 | 12 |
| 1982 | 10 |
| 1987 | 10 |
| 1988 | 30 |
| 1989 | 43 |
| 1990 | 46 |
| 1991 | 49 |
| 1992 | 40 |
| 1993 | 41 |
| 1994 | 33 |
| 1995 | 29 |
| 2004 | 10 |
| 2007 | 10 |