| Year | Count |
|---|---|
| 1914 | 10 |
| 1920 | 5 |
| 1921 | 15 |
| 1922 | 24 |
| 1924 | 10 |
| 1926 | 5 |
| 1928 | 20 |
| 1929 | 8 |
| 1930 | 8 |
| 1932 | 15 |
| 1933 | 55 |
| 1934 | 26 |
| 1935 | 10 |
| 1936 | 22 |
| 1937 | 37 |
| 1939 | 14 |
| 1940 | 35 |
| 1942 | 46 |
| 1943 | 52 |
| 1944 | 59 |
| 1945 | 46 |
| 1946 | 93 |
| 1947 | 87 |
| 1948 | 79 |
| 1949 | 52 |
| 1950 | 24 |
| 1951 | 22 |
| 1952 | 28 |
| 1953 | 24 |
| 1954 | 32 |
| 1956 | 12 |
| 1957 | 19 |
| 1958 | 5 |
| 1966 | 6 |
| 1968 | 12 |
| 1970 | 10 |