| Year | Count |
|---|---|
| 1916 | 17 |
| 1917 | 14 |
| 1918 | 16 |
| 1919 | 6 |
| 1920 | 12 |
| 1921 | 9 |
| 1922 | 7 |
| 1923 | 5 |
| 1924 | 21 |
| 1925 | 8 |
| 1926 | 13 |
| 1927 | 18 |
| 1928 | 24 |
| 1929 | 18 |
| 1930 | 29 |
| 1931 | 18 |
| 1932 | 20 |
| 1933 | 20 |
| 1934 | 10 |
| 1935 | 30 |
| 1936 | 17 |
| 1937 | 11 |
| 1938 | 18 |
| 1939 | 34 |
| 1940 | 8 |
| 1941 | 7 |
| 1950 | 6 |
| 1952 | 5 |
| 1954 | 6 |
| 1956 | 9 |
| 1958 | 5 |
| 1961 | 18 |
| 1977 | 5 |