| Year | Count |
|---|---|
| 1969 | 6 |
| 1970 | 7 |
| 1971 | 8 |
| 1972 | 6 |
| 1976 | 20 |
| 1977 | 6 |
| 1978 | 5 |
| 1979 | 9 |
| 1980 | 21 |
| 1981 | 21 |
| 1982 | 26 |
| 1983 | 10 |
| 1984 | 9 |
| 1985 | 10 |
| 1986 | 16 |
| 1987 | 14 |
| 1988 | 19 |
| 1989 | 12 |
| 1995 | 21 |
| 1996 | 6 |
| 1997 | 10 |
| 2000 | 10 |
| 2011 | 6 |
| 2014 | 12 |
| 2015 | 5 |
| 2017 | 6 |
| 2018 | 5 |
| 2019 | 30 |
| 2020 | 13 |
| 2021 | 18 |
| 2022 | 72 |
| 2023 | 56 |
| 2024 | 89 |