| Year | Count |
|---|---|
| 1921 | 14 |
| 1922 | 10 |
| 1923 | 5 |
| 1924 | 14 |
| 1925 | 18 |
| 1927 | 5 |
| 1928 | 18 |
| 1931 | 38 |
| 1933 | 17 |
| 1934 | 5 |
| 1935 | 26 |
| 1937 | 10 |
| 1938 | 10 |
| 1940 | 16 |
| 1941 | 5 |
| 1942 | 8 |
| 1943 | 5 |
| 1944 | 10 |
| 1946 | 12 |
| 1948 | 5 |
| 1949 | 14 |
| 1950 | 11 |
| 1951 | 24 |
| 1952 | 20 |
| 1953 | 26 |
| 1954 | 28 |
| 1955 | 39 |
| 1956 | 39 |
| 1957 | 31 |
| 1958 | 10 |
| 1960 | 12 |
| 1962 | 26 |
| 1963 | 20 |
| 1964 | 25 |
| 1965 | 20 |
| 1971 | 5 |