| Year | Count |
|---|---|
| 1986 | 6 |
| 1987 | 20 |
| 1988 | 19 |
| 1989 | 25 |
| 1990 | 29 |
| 1990 | 6 |
| 1991 | 32 |
| 1992 | 18 |
| 1993 | 18 |
| 1994 | 35 |
| 1995 | 42 |
| 1996 | 45 |
| 1997 | 80 |
| 1998 | 79 |
| 1999 | 34 |
| 2000 | 51 |
| 2001 | 85 |
| 2002 | 28 |
| 2003 | 47 |
| 2004 | 94 |
| 2005 | 101 |
| 2014 | 5 |
| 2015 | 7 |
| 2016 | 7 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 8 |
| 2021 | 24 |
| 2022 | 29 |
| 2023 | 30 |