| Year | Count |
|---|---|
| 1991 | 11 |
| 1992 | 17 |
| 1993 | 23 |
| 1994 | 15 |
| 1995 | 24 |
| 1996 | 79 |
| 1997 | 159 |
| 1998 | 136 |
| 1999 | 157 |
| 2000 | 179 |
| 2001 | 213 |
| 2002 | 218 |
| 2003 | 229 |
| 2004 | 331 |
| 2004 | 10 |
| 2005 | 402 |
| 2006 | 397 |
| 2007 | 404 |
| 2007 | 11 |
| 2008 | 543 |
| 2008 | 5 |
| 2009 | 519 |
| 2009 | 17 |
| 2010 | 613 |
| 2010 | 7 |
| 2011 | 654 |
| 2012 | 679 |
| 2012 | 12 |
| 2013 | 580 |
| 2014 | 453 |
| 2015 | 527 |
| 2015 | 34 |
| 2016 | 410 |
| 2016 | 51 |
| 2017 | 359 |
| 2017 | 25 |
| 2018 | 302 |
| 2018 | 10 |
| 2019 | 329 |
| 2019 | 12 |
| 2020 | 264 |
| 2020 | 29 |
| 2021 | 302 |
| 2021 | 10 |
| 2022 | 250 |
| 2022 | 23 |
| 2023 | 312 |
| 2023 | 20 |
| 2024 | 325 |
| 2024 | 12 |