| Year | Count |
|---|---|
| 1922 | 10 |
| 1926 | 12 |
| 1927 | 15 |
| 1928 | 5 |
| 1929 | 12 |
| 1931 | 5 |
| 1934 | 24 |
| 1935 | 22 |
| 1936 | 10 |
| 1937 | 5 |
| 1937 | 31 |
| 1938 | 20 |
| 1939 | 28 |
| 1940 | 25 |
| 1941 | 34 |
| 1942 | 43 |
| 1943 | 48 |
| 1944 | 43 |
| 1945 | 55 |
| 1946 | 50 |
| 1947 | 61 |
| 1948 | 18 |
| 1949 | 15 |
| 1950 | 17 |
| 1951 | 11 |
| 1952 | 10 |
| 1953 | 15 |
| 1954 | 5 |
| 1955 | 48 |
| 1956 | 11 |
| 1957 | 90 |
| 1958 | 106 |
| 1959 | 141 |
| 1960 | 111 |
| 1961 | 96 |
| 1962 | 109 |
| 1963 | 77 |
| 1964 | 58 |
| 1965 | 73 |
| 1966 | 30 |
| 1967 | 22 |
| 1968 | 33 |
| 1969 | 8 |
| 1970 | 6 |
| 1971 | 17 |
| 1972 | 9 |
| 1973 | 5 |
| 1974 | 5 |
| 1975 | 6 |
| 1977 | 5 |
| 1978 | 6 |
| 1980 | 5 |
| 1985 | 6 |
| 1988 | 6 |
| 1989 | 6 |
| 1991 | 5 |
| 2009 | 5 |