| Year | Count |
|---|---|
| 1913 | 12 |
| 1914 | 5 |
| 1915 | 38 |
| 1916 | 23 |
| 1917 | 61 |
| 1918 | 99 |
| 1919 | 102 |
| 1920 | 96 |
| 1921 | 113 |
| 1922 | 100 |
| 1923 | 128 |
| 1924 | 119 |
| 1925 | 124 |
| 1926 | 125 |
| 1927 | 141 |
| 1928 | 110 |
| 1929 | 98 |
| 1930 | 87 |
| 1931 | 90 |
| 1932 | 87 |
| 1933 | 82 |
| 1934 | 81 |
| 1935 | 91 |
| 1936 | 103 |
| 1937 | 70 |
| 1938 | 57 |
| 1939 | 66 |
| 1940 | 83 |
| 1941 | 105 |
| 1942 | 71 |
| 1943 | 83 |
| 1944 | 59 |
| 1945 | 50 |
| 1946 | 58 |
| 1947 | 97 |
| 1948 | 55 |
| 1949 | 63 |
| 1950 | 40 |
| 1951 | 39 |
| 1952 | 21 |
| 1953 | 44 |
| 1954 | 22 |
| 1955 | 40 |
| 1956 | 32 |
| 1957 | 6 |
| 1958 | 36 |
| 1959 | 45 |
| 1960 | 18 |
| 1961 | 16 |
| 1962 | 27 |
| 1964 | 15 |
| 1965 | 12 |
| 1966 | 13 |
| 1967 | 7 |
| 1969 | 5 |