| Year | Count |
|---|---|
| 1916 | 21 |
| 1918 | 25 |
| 1920 | 10 |
| 1921 | 21 |
| 1923 | 6 |
| 1924 | 18 |
| 1925 | 31 |
| 1926 | 29 |
| 1927 | 21 |
| 1928 | 38 |
| 1929 | 26 |
| 1930 | 38 |
| 1931 | 60 |
| 1932 | 10 |
| 1933 | 31 |
| 1934 | 25 |
| 1935 | 5 |
| 1936 | 5 |
| 1937 | 33 |
| 1938 | 5 |
| 1940 | 5 |
| 1942 | 5 |
| 1946 | 5 |
| 1947 | 24 |
| 1949 | 11 |
| 1951 | 5 |
| 1951 | 19 |
| 1956 | 10 |
| 1958 | 9 |
| 1959 | 5 |
| 1967 | 5 |
| 1969 | 6 |
| 1970 | 12 |