| Year | Count |
|---|---|
| 1919 | 20 |
| 1963 | 20 |
| 1969 | 7 |
| 1971 | 5 |
| 1972 | 20 |
| 1974 | 20 |
| 1975 | 5 |
| 1978 | 20 |
| 1979 | 25 |
| 1980 | 22 |
| 1981 | 7 |
| 1982 | 26 |
| 1983 | 22 |
| 1985 | 15 |
| 1986 | 10 |
| 1987 | 23 |
| 1988 | 13 |
| 1989 | 56 |
| 1990 | 71 |
| 1991 | 52 |
| 1992 | 40 |
| 1993 | 48 |
| 1994 | 60 |
| 1995 | 21 |
| 1996 | 33 |
| 1997 | 47 |
| 1998 | 52 |
| 1999 | 45 |
| 2000 | 27 |
| 2001 | 41 |
| 2005 | 16 |
| 2008 | 17 |
| 2011 | 12 |
| 2021 | 10 |