| Year | Count |
|---|---|
| 1911 | 7 |
| 1913 | 9 |
| 1914 | 8 |
| 1915 | 11 |
| 1916 | 6 |
| 1917 | 12 |
| 1918 | 10 |
| 1920 | 9 |
| 1921 | 8 |
| 1922 | 8 |
| 1923 | 9 |
| 1924 | 16 |
| 1925 | 12 |
| 1926 | 7 |
| 1927 | 8 |
| 1928 | 12 |
| 1929 | 10 |
| 1930 | 5 |
| 1931 | 16 |
| 1932 | 11 |
| 1933 | 8 |
| 1935 | 5 |
| 1937 | 6 |
| 1939 | 6 |
| 1942 | 6 |
| 1944 | 6 |
| 1946 | 6 |
| 1947 | 8 |
| 1960 | 6 |
| 1964 | 5 |
| 1968 | 5 |
| 1971 | 5 |
| 1988 | 6 |
| 2003 | 5 |