| Year | Count |
|---|---|
| 1915 | 11 |
| 1916 | 33 |
| 1917 | 7 |
| 1918 | 12 |
| 1919 | 23 |
| 1920 | 23 |
| 1921 | 20 |
| 1922 | 20 |
| 1923 | 10 |
| 1924 | 33 |
| 1925 | 18 |
| 1926 | 36 |
| 1928 | 15 |
| 1929 | 32 |
| 1930 | 13 |
| 1931 | 22 |
| 1932 | 8 |
| 1933 | 5 |
| 1934 | 15 |
| 1935 | 10 |
| 1937 | 10 |
| 1938 | 10 |
| 1939 | 10 |
| 1940 | 28 |
| 1941 | 5 |
| 1942 | 5 |
| 1943 | 30 |
| 1944 | 5 |
| 1946 | 6 |
| 1948 | 27 |
| 1949 | 15 |
| 1950 | 33 |
| 1956 | 6 |
| 1957 | 10 |