| Year | Count |
|---|---|
| 1914 | 7 |
| 1917 | 9 |
| 1919 | 7 |
| 1923 | 6 |
| 1925 | 6 |
| 1926 | 8 |
| 1927 | 6 |
| 1928 | 9 |
| 1931 | 5 |
| 1932 | 6 |
| 1934 | 6 |
| 1935 | 12 |
| 1937 | 5 |
| 1939 | 7 |
| 1940 | 6 |
| 1942 | 6 |
| 1947 | 9 |
| 1949 | 8 |
| 1950 | 10 |
| 1959 | 5 |
| 1961 | 6 |
| 1962 | 8 |
| 1964 | 7 |
| 1967 | 6 |
| 1968 | 9 |
| 1970 | 5 |
| 1971 | 8 |
| 1972 | 7 |
| 1974 | 9 |
| 1988 | 5 |
| 1990 | 6 |
| 1992 | 5 |
| 1994 | 6 |
| 1997 | 5 |
| 2001 | 6 |
| 2004 | 6 |
| 2005 | 6 |
| 2006 | 7 |
| 2007 | 5 |
| 2014 | 6 |
| 2016 | 12 |
| 2020 | 7 |
| 2022 | 6 |
| 2023 | 5 |