| Year | Count |
|---|---|
| 1974 | 10 |
| 1975 | 10 |
| 1980 | 14 |
| 1981 | 16 |
| 1982 | 14 |
| 1984 | 14 |
| 1985 | 12 |
| 1987 | 18 |
| 1988 | 14 |
| 1990 | 18 |
| 1991 | 10 |
| 1993 | 12 |
| 1994 | 16 |
| 1995 | 14 |
| 1996 | 14 |
| 1997 | 12 |
| 1998 | 12 |
| 1999 | 14 |
| 2000 | 12 |
| 2001 | 18 |
| 2002 | 10 |
| 2004 | 10 |
| 2005 | 10 |
| 2006 | 12 |
| 2007 | 14 |
| 2009 | 14 |
| 2011 | 15 |
| 2012 | 10 |
| 2013 | 14 |
| 2014 | 11 |
| 2015 | 22 |
| 2016 | 16 |
| 2017 | 50 |
| 2018 | 35 |
| 2019 | 42 |
| 2020 | 43 |
| 2021 | 46 |
| 2022 | 51 |
| 2023 | 76 |
| 2024 | 100 |