| Year | Count |
|---|---|
| 1929 | 20 |
| 1942 | 14 |
| 1943 | 16 |
| 1944 | 18 |
| 1946 | 7 |
| 1947 | 11 |
| 1948 | 5 |
| 1949 | 5 |
| 1950 | 47 |
| 1951 | 7 |
| 1954 | 8 |
| 1955 | 16 |
| 1956 | 16 |
| 1960 | 10 |
| 1961 | 22 |
| 1963 | 5 |
| 1964 | 12 |
| 1967 | 17 |
| 1980 | 5 |
| 1981 | 7 |
| 1982 | 5 |
| 1983 | 15 |
| 1984 | 19 |
| 1985 | 12 |
| 1986 | 18 |
| 1988 | 10 |
| 1989 | 10 |
| 1990 | 5 |
| 1994 | 10 |
| 1995 | 18 |
| 1997 | 7 |
| 2004 | 12 |
| 2006 | 5 |
| 2007 | 6 |
| 2010 | 5 |