| Year | Count |
|---|---|
| 1910 | 32 |
| 1911 | 39 |
| 1912 | 59 |
| 1913 | 56 |
| 1914 | 89 |
| 1915 | 155 |
| 1916 | 139 |
| 1917 | 201 |
| 1918 | 192 |
| 1919 | 118 |
| 1920 | 146 |
| 1921 | 146 |
| 1922 | 130 |
| 1923 | 129 |
| 1924 | 162 |
| 1925 | 234 |
| 1926 | 190 |
| 1927 | 289 |
| 1928 | 301 |
| 1929 | 238 |
| 1930 | 279 |
| 1931 | 278 |
| 1932 | 291 |
| 1933 | 287 |
| 1934 | 215 |
| 1935 | 272 |
| 1936 | 168 |
| 1937 | 181 |
| 1938 | 107 |
| 1939 | 159 |
| 1940 | 130 |
| 1941 | 86 |
| 1942 | 70 |
| 1943 | 63 |
| 1944 | 52 |
| 1945 | 42 |
| 1946 | 35 |
| 1947 | 26 |
| 1948 | 56 |
| 1949 | 18 |
| 1950 | 24 |
| 1951 | 26 |
| 1952 | 7 |
| 1953 | 14 |
| 1954 | 25 |
| 1955 | 8 |
| 1958 | 6 |