| Year | Count |
|---|---|
| 1916 | 25 |
| 1917 | 5 |
| 1921 | 5 |
| 1923 | 7 |
| 1924 | 5 |
| 1925 | 10 |
| 1926 | 6 |
| 1927 | 16 |
| 1928 | 11 |
| 1929 | 19 |
| 1930 | 15 |
| 1931 | 20 |
| 1932 | 17 |
| 1933 | 15 |
| 1934 | 17 |
| 1935 | 17 |
| 1936 | 15 |
| 1938 | 10 |
| 1939 | 5 |
| 1940 | 7 |
| 1942 | 6 |
| 1943 | 7 |
| 1946 | 5 |
| 1947 | 18 |
| 1948 | 12 |
| 1949 | 12 |
| 1950 | 5 |
| 1951 | 10 |
| 1952 | 21 |
| 1953 | 18 |
| 1954 | 14 |
| 1955 | 6 |
| 1956 | 7 |
| 1957 | 14 |
| 1958 | 31 |
| 1959 | 49 |
| 1960 | 31 |
| 1961 | 26 |
| 1962 | 5 |
| 1963 | 26 |
| 1964 | 14 |
| 1970 | 5 |
| 1974 | 5 |