| Year | Count |
|---|---|
| 1924 | 5 |
| 1961 | 161 |
| 1962 | 59 |
| 1963 | 64 |
| 1964 | 78 |
| 1965 | 107 |
| 1966 | 101 |
| 1967 | 112 |
| 1968 | 116 |
| 1969 | 137 |
| 1970 | 160 |
| 1971 | 116 |
| 1972 | 146 |
| 1973 | 64 |
| 1974 | 99 |
| 1975 | 85 |
| 1976 | 110 |
| 1977 | 108 |
| 1978 | 66 |
| 1979 | 33 |
| 1980 | 36 |
| 1981 | 6 |
| 1982 | 21 |
| 1983 | 29 |
| 1984 | 11 |
| 1985 | 88 |
| 1986 | 42 |
| 1987 | 42 |
| 1988 | 71 |
| 1989 | 69 |
| 1990 | 52 |
| 1991 | 40 |
| 1992 | 74 |
| 1993 | 29 |
| 1994 | 70 |
| 1995 | 41 |
| 1996 | 52 |
| 1997 | 25 |
| 1998 | 12 |
| 2000 | 17 |
| 2001 | 12 |
| 2002 | 35 |
| 2004 | 12 |
| 2005 | 10 |
| 2009 | 23 |
| 2011 | 11 |
| 2014 | 5 |
| 2015 | 10 |
| 2017 | 29 |
| 2018 | 10 |
| 2019 | 21 |
| 2023 | 10 |