| Year | Count |
|---|---|
| 1912 | 10 |
| 1913 | 12 |
| 1915 | 10 |
| 1916 | 10 |
| 1917 | 12 |
| 1920 | 19 |
| 1921 | 14 |
| 1922 | 63 |
| 1923 | 258 |
| 1924 | 293 |
| 1925 | 435 |
| 1926 | 366 |
| 1927 | 470 |
| 1928 | 361 |
| 1929 | 319 |
| 1930 | 210 |
| 1931 | 179 |
| 1932 | 142 |
| 1933 | 59 |
| 1934 | 81 |
| 1935 | 60 |
| 1936 | 70 |
| 1937 | 26 |
| 1938 | 24 |
| 1939 | 32 |
| 1940 | 33 |
| 1941 | 44 |
| 1942 | 17 |
| 1943 | 36 |
| 1944 | 29 |
| 1945 | 31 |
| 1946 | 18 |
| 1947 | 29 |
| 1948 | 27 |
| 1949 | 18 |
| 1950 | 32 |
| 1951 | 10 |
| 1952 | 8 |
| 1953 | 16 |
| 1954 | 28 |
| 1955 | 10 |
| 1956 | 5 |
| 1957 | 44 |
| 1958 | 10 |
| 1960 | 10 |
| 1961 | 6 |
| 1962 | 6 |
| 1963 | 28 |
| 1964 | 12 |
| 1965 | 7 |
| 1966 | 10 |
| 1968 | 5 |
| 1969 | 5 |
| 1970 | 20 |
| 1979 | 5 |
| 1987 | 10 |