| Year | Count |
|---|---|
| 1910 | 60 |
| 1911 | 104 |
| 1912 | 138 |
| 1913 | 152 |
| 1914 | 185 |
| 1915 | 243 |
| 1916 | 335 |
| 1917 | 383 |
| 1918 | 415 |
| 1919 | 451 |
| 1920 | 406 |
| 1921 | 347 |
| 1922 | 371 |
| 1923 | 383 |
| 1924 | 400 |
| 1925 | 399 |
| 1926 | 355 |
| 1927 | 270 |
| 1928 | 282 |
| 1929 | 309 |
| 1930 | 290 |
| 1931 | 179 |
| 1932 | 135 |
| 1933 | 124 |
| 1934 | 146 |
| 1935 | 103 |
| 1936 | 124 |
| 1937 | 116 |
| 1938 | 100 |
| 1939 | 92 |
| 1940 | 86 |
| 1941 | 110 |
| 1942 | 83 |
| 1943 | 73 |
| 1944 | 89 |
| 1945 | 23 |
| 1946 | 59 |
| 1947 | 83 |
| 1948 | 56 |
| 1949 | 70 |
| 1950 | 45 |
| 1951 | 24 |
| 1953 | 25 |
| 1954 | 31 |
| 1955 | 44 |
| 1956 | 19 |
| 1957 | 25 |
| 1959 | 33 |
| 1963 | 18 |
| 1964 | 10 |