| Year | Count |
|---|---|
| 1910 | 6 |
| 1912 | 5 |
| 1914 | 5 |
| 1915 | 5 |
| 1916 | 10 |
| 1919 | 5 |
| 1921 | 10 |
| 1923 | 11 |
| 1924 | 5 |
| 1936 | 5 |
| 1958 | 5 |
| 1960 | 15 |
| 1961 | 13 |
| 1962 | 10 |
| 1963 | 15 |
| 1964 | 21 |
| 1965 | 29 |
| 1966 | 15 |
| 1967 | 36 |
| 1968 | 97 |
| 1969 | 25 |
| 1970 | 71 |
| 1971 | 35 |
| 1972 | 38 |
| 1973 | 5 |
| 1975 | 17 |
| 1976 | 5 |
| 1977 | 10 |
| 1978 | 12 |
| 1981 | 26 |
| 1982 | 26 |
| 1984 | 10 |
| 1985 | 25 |
| 1986 | 24 |
| 1988 | 8 |
| 1990 | 10 |
| 1993 | 10 |
| 1998 | 27 |
| 2001 | 28 |
| 2002 | 5 |
| 2004 | 5 |