| Year | Count |
|---|---|
| 1915 | 13 |
| 1916 | 7 |
| 1917 | 11 |
| 1918 | 5 |
| 1919 | 5 |
| 1921 | 12 |
| 1922 | 23 |
| 1923 | 19 |
| 1924 | 24 |
| 1925 | 24 |
| 1926 | 23 |
| 1927 | 6 |
| 1928 | 20 |
| 1929 | 20 |
| 1930 | 24 |
| 1931 | 7 |
| 1934 | 6 |
| 1943 | 15 |
| 1944 | 5 |
| 1947 | 5 |
| 1952 | 7 |
| 1955 | 6 |
| 1957 | 12 |
| 1958 | 17 |
| 1959 | 10 |
| 1960 | 5 |
| 1961 | 16 |
| 1963 | 5 |
| 1965 | 5 |
| 1971 | 5 |
| 1973 | 6 |
| 1975 | 10 |
| 1977 | 10 |
| 1980 | 6 |
| 1987 | 10 |
| 1990 | 8 |
| 1993 | 31 |
| 1994 | 62 |
| 1995 | 37 |
| 1996 | 41 |
| 1997 | 51 |
| 1998 | 25 |
| 1999 | 35 |
| 2000 | 6 |
| 2001 | 12 |
| 2010 | 5 |
| 2016 | 10 |