| Year | Count |
|---|---|
| 1970 | 5 |
| 1972 | 5 |
| 1973 | 17 |
| 1974 | 5 |
| 1975 | 10 |
| 1976 | 25 |
| 1977 | 13 |
| 1978 | 65 |
| 1979 | 25 |
| 1980 | 43 |
| 1981 | 39 |
| 1982 | 104 |
| 1983 | 47 |
| 1984 | 24 |
| 1985 | 38 |
| 1989 | 5 |
| 1990 | 5 |
| 1991 | 20 |
| 1993 | 5 |
| 2009 | 12 |
| 2010 | 7 |
| 2011 | 62 |
| 2013 | 5 |
| 2014 | 5 |
| 2015 | 5 |
| 2016 | 30 |
| 2017 | 7 |
| 2019 | 16 |
| 2020 | 6 |
| 2021 | 7 |
| 2022 | 19 |
| 2023 | 31 |
| 2024 | 13 |