| Year | Count |
|---|---|
| 1918 | 5 |
| 1921 | 5 |
| 1922 | 6 |
| 1927 | 14 |
| 1928 | 21 |
| 1929 | 17 |
| 1930 | 19 |
| 1931 | 22 |
| 1932 | 43 |
| 1933 | 39 |
| 1934 | 50 |
| 1935 | 60 |
| 1936 | 5 |
| 1936 | 26 |
| 1937 | 36 |
| 1938 | 5 |
| 1938 | 81 |
| 1939 | 62 |
| 1940 | 9 |
| 1940 | 62 |
| 1941 | 114 |
| 1942 | 64 |
| 1943 | 65 |
| 1944 | 53 |
| 1945 | 27 |
| 1946 | 36 |
| 1947 | 98 |
| 1948 | 47 |
| 1949 | 52 |
| 1950 | 5 |
| 1950 | 57 |
| 1951 | 80 |
| 1952 | 69 |
| 1953 | 6 |
| 1953 | 45 |
| 1954 | 59 |
| 1955 | 73 |
| 1956 | 6 |
| 1956 | 59 |
| 1957 | 42 |
| 1958 | 38 |
| 1959 | 47 |
| 1960 | 44 |
| 1961 | 63 |
| 1962 | 16 |
| 1963 | 40 |
| 1964 | 24 |
| 1965 | 7 |
| 1967 | 10 |
| 1968 | 13 |
| 1970 | 15 |
| 1982 | 31 |
| 1983 | 12 |
| 1997 | 15 |