| Year | Count |
|---|---|
| 1911 | 6 |
| 1912 | 12 |
| 1913 | 16 |
| 1914 | 25 |
| 1915 | 49 |
| 1916 | 70 |
| 1917 | 61 |
| 1918 | 41 |
| 1919 | 40 |
| 1920 | 37 |
| 1921 | 27 |
| 1922 | 31 |
| 1923 | 33 |
| 1924 | 21 |
| 1925 | 22 |
| 1926 | 42 |
| 1927 | 47 |
| 1928 | 13 |
| 1929 | 24 |
| 1930 | 20 |
| 1931 | 23 |
| 1932 | 28 |
| 1933 | 18 |
| 1934 | 13 |
| 1935 | 38 |
| 1936 | 26 |
| 1937 | 12 |
| 1938 | 19 |
| 1939 | 22 |
| 1940 | 12 |
| 1941 | 9 |
| 1942 | 8 |
| 1943 | 6 |
| 1945 | 5 |
| 1947 | 7 |
| 1951 | 5 |
| 1953 | 8 |
| 1955 | 6 |
| 1965 | 5 |
| 1967 | 5 |
| 1983 | 6 |
| 1988 | 7 |