| Year | Count |
|---|---|
| 1915 | 19 |
| 1917 | 10 |
| 1918 | 10 |
| 1919 | 5 |
| 1920 | 10 |
| 1921 | 28 |
| 1922 | 31 |
| 1923 | 38 |
| 1924 | 46 |
| 1925 | 29 |
| 1926 | 46 |
| 1927 | 21 |
| 1928 | 14 |
| 1929 | 25 |
| 1930 | 13 |
| 1931 | 52 |
| 1932 | 35 |
| 1933 | 47 |
| 1934 | 18 |
| 1935 | 35 |
| 1936 | 32 |
| 1937 | 33 |
| 1938 | 34 |
| 1939 | 17 |
| 1940 | 32 |
| 1941 | 26 |
| 1942 | 12 |
| 1943 | 22 |
| 1945 | 6 |
| 1947 | 5 |
| 1948 | 7 |
| 1949 | 6 |
| 1950 | 5 |
| 1954 | 15 |