| Year | Count |
|---|---|
| 1910 | 5 |
| 1911 | 19 |
| 1912 | 25 |
| 1913 | 26 |
| 1914 | 46 |
| 1915 | 120 |
| 1916 | 96 |
| 1917 | 136 |
| 1918 | 87 |
| 1919 | 65 |
| 1920 | 123 |
| 1921 | 91 |
| 1922 | 87 |
| 1923 | 91 |
| 1924 | 77 |
| 1925 | 80 |
| 1926 | 67 |
| 1927 | 84 |
| 1928 | 79 |
| 1929 | 41 |
| 1930 | 35 |
| 1931 | 28 |
| 1932 | 41 |
| 1933 | 17 |
| 1935 | 6 |
| 1937 | 16 |
| 1938 | 18 |
| 1941 | 5 |
| 1942 | 11 |
| 1943 | 5 |
| 1947 | 8 |
| 1951 | 6 |