| Year | Count |
|---|---|
| 1925 | 5 |
| 1928 | 13 |
| 1931 | 27 |
| 1932 | 10 |
| 1933 | 27 |
| 1937 | 10 |
| 1938 | 12 |
| 1940 | 15 |
| 1942 | 5 |
| 1943 | 6 |
| 1944 | 22 |
| 1945 | 5 |
| 1948 | 20 |
| 1949 | 12 |
| 1952 | 10 |
| 1955 | 24 |
| 1956 | 24 |
| 1957 | 32 |
| 1958 | 29 |
| 1959 | 10 |
| 1960 | 16 |
| 1963 | 36 |
| 1965 | 24 |
| 1967 | 23 |
| 1968 | 10 |
| 1970 | 7 |
| 1971 | 7 |
| 1972 | 9 |
| 1984 | 10 |
| 1986 | 14 |
| 1988 | 5 |
| 1992 | 10 |
| 1993 | 5 |
| 1996 | 12 |
| 1998 | 6 |
| 2003 | 10 |
| 2007 | 5 |
| 2008 | 12 |
| 2009 | 5 |
| 2010 | 10 |
| 2012 | 7 |
| 2015 | 10 |
| 2020 | 5 |
| 2023 | 6 |