| Year | Count |
|---|---|
| 1910 | 17 |
| 1911 | 28 |
| 1912 | 103 |
| 1913 | 111 |
| 1914 | 210 |
| 1915 | 261 |
| 1916 | 249 |
| 1917 | 276 |
| 1918 | 289 |
| 1919 | 206 |
| 1920 | 231 |
| 1921 | 295 |
| 1922 | 184 |
| 1923 | 216 |
| 1924 | 171 |
| 1925 | 171 |
| 1926 | 173 |
| 1927 | 136 |
| 1928 | 130 |
| 1929 | 114 |
| 1930 | 90 |
| 1931 | 88 |
| 1932 | 77 |
| 1933 | 73 |
| 1934 | 35 |
| 1935 | 59 |
| 1936 | 60 |
| 1937 | 52 |
| 1938 | 55 |
| 1939 | 32 |
| 1940 | 24 |
| 1941 | 43 |
| 1942 | 23 |
| 1943 | 56 |
| 1944 | 35 |
| 1945 | 5 |
| 1946 | 25 |
| 1947 | 37 |
| 1948 | 26 |
| 1949 | 12 |
| 1950 | 26 |
| 1951 | 27 |
| 1952 | 11 |
| 1953 | 10 |
| 1954 | 5 |
| 1955 | 7 |
| 1956 | 5 |
| 1957 | 23 |
| 1960 | 11 |
| 1961 | 6 |
| 1965 | 9 |