| Year | Count |
|---|---|
| 1910 | 283 |
| 1911 | 286 |
| 1912 | 304 |
| 1913 | 351 |
| 1914 | 376 |
| 1915 | 504 |
| 1916 | 546 |
| 1917 | 572 |
| 1918 | 626 |
| 1919 | 568 |
| 1920 | 595 |
| 1921 | 531 |
| 1922 | 475 |
| 1923 | 427 |
| 1924 | 417 |
| 1925 | 441 |
| 1926 | 420 |
| 1927 | 404 |
| 1928 | 451 |
| 1929 | 259 |
| 1930 | 284 |
| 1931 | 246 |
| 1932 | 238 |
| 1933 | 210 |
| 1934 | 198 |
| 1935 | 135 |
| 1936 | 123 |
| 1937 | 132 |
| 1938 | 91 |
| 1939 | 57 |
| 1940 | 114 |
| 1941 | 51 |
| 1942 | 50 |
| 1943 | 45 |
| 1944 | 63 |
| 1945 | 27 |
| 1946 | 27 |
| 1947 | 44 |
| 1948 | 36 |
| 1949 | 29 |
| 1950 | 12 |
| 1951 | 11 |
| 1952 | 32 |
| 1953 | 17 |
| 1954 | 5 |
| 1955 | 5 |
| 1956 | 6 |
| 1958 | 7 |
| 1962 | 10 |