| Year | Count |
|---|---|
| 1954 | 5 |
| 1955 | 29 |
| 1956 | 75 |
| 1957 | 97 |
| 1958 | 88 |
| 1959 | 120 |
| 1960 | 105 |
| 1961 | 70 |
| 1962 | 140 |
| 1963 | 152 |
| 1964 | 158 |
| 1965 | 198 |
| 1966 | 297 |
| 1967 | 232 |
| 1968 | 185 |
| 1969 | 142 |
| 1970 | 173 |
| 1971 | 185 |
| 1972 | 137 |
| 1973 | 136 |
| 1974 | 129 |
| 1975 | 128 |
| 1976 | 84 |
| 1977 | 106 |
| 1978 | 68 |
| 1979 | 53 |
| 1980 | 35 |
| 1981 | 48 |
| 1982 | 16 |
| 1983 | 15 |
| 1984 | 72 |
| 1985 | 108 |
| 1986 | 90 |
| 1987 | 34 |
| 1988 | 37 |
| 1989 | 62 |
| 1990 | 34 |
| 1991 | 66 |
| 1992 | 32 |
| 1993 | 40 |
| 1994 | 10 |
| 1995 | 5 |
| 1996 | 11 |
| 2001 | 5 |
| 2002 | 5 |
| 2006 | 6 |
| 2011 | 5 |
| 2012 | 5 |
| 2023 | 5 |