| Year | Count |
|---|---|
| 1914 | 14 |
| 1916 | 5 |
| 1917 | 35 |
| 1919 | 20 |
| 1920 | 5 |
| 1921 | 38 |
| 1922 | 32 |
| 1923 | 46 |
| 1924 | 48 |
| 1925 | 31 |
| 1926 | 77 |
| 1927 | 70 |
| 1928 | 72 |
| 1929 | 45 |
| 1930 | 34 |
| 1931 | 62 |
| 1932 | 72 |
| 1933 | 98 |
| 1934 | 41 |
| 1935 | 44 |
| 1936 | 67 |
| 1937 | 59 |
| 1938 | 45 |
| 1939 | 47 |
| 1940 | 61 |
| 1941 | 90 |
| 1942 | 103 |
| 1943 | 100 |
| 1944 | 90 |
| 1945 | 78 |
| 1946 | 138 |
| 1947 | 180 |
| 1948 | 117 |
| 1949 | 109 |
| 1950 | 119 |
| 1951 | 101 |
| 1952 | 137 |
| 1953 | 106 |
| 1954 | 66 |
| 1955 | 48 |
| 1956 | 41 |
| 1957 | 36 |
| 1958 | 35 |
| 1959 | 31 |
| 1960 | 21 |
| 1962 | 12 |
| 1963 | 23 |
| 1967 | 11 |