| Year | Count |
|---|---|
| 1910 | 6 |
| 1912 | 6 |
| 1914 | 5 |
| 1915 | 9 |
| 1916 | 7 |
| 1917 | 16 |
| 1918 | 9 |
| 1919 | 7 |
| 1920 | 10 |
| 1921 | 8 |
| 1922 | 28 |
| 1923 | 12 |
| 1924 | 20 |
| 1925 | 12 |
| 1926 | 22 |
| 1927 | 20 |
| 1928 | 10 |
| 1929 | 14 |
| 1930 | 10 |
| 1933 | 6 |
| 1934 | 7 |
| 1938 | 5 |
| 1941 | 7 |
| 1942 | 6 |
| 1945 | 5 |
| 1946 | 9 |
| 1947 | 6 |
| 1948 | 7 |
| 1949 | 10 |
| 1951 | 7 |
| 1952 | 6 |
| 1955 | 5 |
| 1958 | 18 |
| 1959 | 16 |
| 1962 | 5 |
| 1963 | 7 |
| 1964 | 6 |
| 1966 | 5 |
| 1970 | 7 |
| 1971 | 5 |
| 1973 | 7 |
| 1976 | 14 |
| 1978 | 20 |
| 1989 | 6 |
| 1990 | 5 |
| 1993 | 5 |
| 2001 | 7 |
| 2002 | 5 |
| 2007 | 9 |
| 2009 | 5 |
| 2014 | 6 |
| 2016 | 18 |
| 2017 | 15 |
| 2018 | 10 |