| Year | Count |
|---|---|
| 1976 | 5 |
| 1994 | 5 |
| 1995 | 7 |
| 1997 | 7 |
| 1998 | 6 |
| 1999 | 103 |
| 2000 | 18 |
| 2000 | 218 |
| 2001 | 12 |
| 2001 | 217 |
| 2002 | 7 |
| 2002 | 219 |
| 2003 | 26 |
| 2003 | 289 |
| 2004 | 18 |
| 2004 | 327 |
| 2005 | 10 |
| 2005 | 376 |
| 2006 | 17 |
| 2006 | 403 |
| 2007 | 11 |
| 2007 | 428 |
| 2008 | 42 |
| 2008 | 407 |
| 2009 | 43 |
| 2009 | 361 |
| 2010 | 53 |
| 2010 | 417 |
| 2011 | 25 |
| 2011 | 392 |
| 2012 | 16 |
| 2012 | 365 |
| 2013 | 18 |
| 2013 | 417 |
| 2014 | 16 |
| 2014 | 551 |
| 2015 | 10 |
| 2015 | 555 |
| 2016 | 540 |
| 2017 | 617 |
| 2018 | 14 |
| 2018 | 617 |
| 2019 | 599 |
| 2020 | 36 |
| 2020 | 535 |
| 2021 | 14 |
| 2021 | 650 |
| 2022 | 649 |
| 2023 | 533 |
| 2024 | 535 |