| Year | Count |
|---|---|
| 1911 | 5 |
| 1912 | 60 |
| 1913 | 32 |
| 1914 | 117 |
| 1915 | 107 |
| 1916 | 203 |
| 1917 | 188 |
| 1918 | 194 |
| 1919 | 207 |
| 1920 | 230 |
| 1921 | 190 |
| 1922 | 212 |
| 1923 | 228 |
| 1924 | 244 |
| 1925 | 253 |
| 1926 | 254 |
| 1927 | 237 |
| 1928 | 304 |
| 1929 | 253 |
| 1930 | 252 |
| 1931 | 248 |
| 1932 | 203 |
| 1933 | 220 |
| 1934 | 278 |
| 1935 | 161 |
| 1936 | 238 |
| 1937 | 195 |
| 1938 | 203 |
| 1939 | 126 |
| 1940 | 154 |
| 1941 | 191 |
| 1942 | 164 |
| 1943 | 141 |
| 1944 | 159 |
| 1945 | 136 |
| 1946 | 115 |
| 1947 | 106 |
| 1948 | 64 |
| 1949 | 53 |
| 1950 | 79 |
| 1951 | 76 |
| 1952 | 46 |
| 1953 | 66 |
| 1954 | 46 |
| 1955 | 68 |
| 1956 | 54 |
| 1957 | 59 |
| 1958 | 27 |
| 1959 | 38 |
| 1960 | 7 |
| 1961 | 45 |
| 1962 | 7 |
| 1963 | 8 |
| 1964 | 12 |
| 1965 | 14 |
| 1966 | 17 |
| 1967 | 16 |
| 1970 | 10 |
| 1971 | 7 |
| 1972 | 5 |
| 1973 | 5 |
| 1974 | 6 |
| 1977 | 6 |
| 1981 | 5 |