| Year | Count |
|---|---|
| 1911 | 7 |
| 1912 | 9 |
| 1913 | 6 |
| 1914 | 10 |
| 1915 | 21 |
| 1916 | 7 |
| 1917 | 5 |
| 1918 | 6 |
| 1919 | 5 |
| 1921 | 10 |
| 1923 | 5 |
| 1924 | 15 |
| 1925 | 10 |
| 1926 | 15 |
| 1928 | 12 |
| 1933 | 5 |
| 1937 | 5 |
| 1938 | 5 |
| 1939 | 10 |
| 1940 | 6 |
| 1941 | 23 |
| 1943 | 20 |
| 1944 | 18 |
| 1945 | 15 |
| 1946 | 5 |
| 1949 | 18 |
| 1950 | 31 |
| 1951 | 10 |
| 1956 | 10 |
| 1978 | 6 |
| 1986 | 10 |
| 1991 | 12 |
| 1999 | 17 |
| 2000 | 10 |
| 2001 | 10 |
| 2018 | 10 |