| Year | Count |
|---|---|
| 1911 | 6 |
| 1915 | 12 |
| 1916 | 14 |
| 1918 | 13 |
| 1919 | 8 |
| 1920 | 8 |
| 1921 | 8 |
| 1922 | 19 |
| 1923 | 16 |
| 1924 | 12 |
| 1927 | 22 |
| 1928 | 16 |
| 1929 | 14 |
| 1930 | 10 |
| 1931 | 6 |
| 1932 | 6 |
| 1933 | 6 |
| 1934 | 5 |
| 1935 | 6 |
| 1936 | 7 |
| 1940 | 5 |
| 1962 | 7 |
| 1963 | 7 |
| 1966 | 6 |
| 1968 | 6 |
| 1973 | 5 |
| 1975 | 5 |
| 1980 | 19 |
| 1981 | 5 |
| 1982 | 5 |
| 1983 | 5 |
| 1985 | 28 |
| 1986 | 35 |
| 1987 | 17 |
| 1988 | 5 |
| 1989 | 30 |
| 1992 | 6 |
| 1994 | 10 |
| 1996 | 10 |
| 1997 | 5 |
| 1998 | 11 |
| 1999 | 6 |
| 2000 | 5 |
| 2013 | 5 |