| Year | Count |
|---|---|
| 1972 | 9 |
| 1973 | 6 |
| 1976 | 5 |
| 1991 | 9 |
| 1992 | 9 |
| 1993 | 12 |
| 1994 | 21 |
| 1995 | 15 |
| 1996 | 7 |
| 1997 | 10 |
| 1998 | 10 |
| 1999 | 11 |
| 2000 | 5 |
| 2001 | 9 |
| 2002 | 7 |
| 2003 | 5 |
| 2005 | 7 |
| 2015 | 9 |
| 2016 | 22 |
| 2017 | 18 |
| 2017 | 26 |
| 2018 | 14 |
| 2018 | 34 |
| 2019 | 22 |
| 2019 | 34 |
| 2020 | 16 |
| 2020 | 21 |
| 2021 | 18 |
| 2021 | 21 |
| 2022 | 16 |
| 2022 | 16 |
| 2023 | 18 |
| 2023 | 18 |
| 2024 | 7 |