| Year | Count |
|---|---|
| 1910 | 15 |
| 1915 | 10 |
| 1916 | 5 |
| 1917 | 21 |
| 1918 | 5 |
| 1921 | 6 |
| 1922 | 11 |
| 1924 | 10 |
| 1925 | 6 |
| 1926 | 26 |
| 1928 | 20 |
| 1929 | 15 |
| 1932 | 5 |
| 1934 | 20 |
| 1935 | 32 |
| 1940 | 6 |
| 1941 | 30 |
| 1942 | 8 |
| 1943 | 5 |
| 1944 | 12 |
| 1947 | 15 |
| 1948 | 6 |
| 1949 | 137 |
| 1950 | 57 |
| 1951 | 46 |
| 1952 | 22 |
| 1953 | 5 |
| 1954 | 43 |
| 1955 | 26 |
| 1956 | 26 |
| 1963 | 28 |
| 1965 | 6 |
| 1970 | 6 |