| Year | Count |
|---|---|
| 1993 | 6 |
| 1997 | 8 |
| 1999 | 10 |
| 1999 | 18 |
| 2000 | 10 |
| 2001 | 12 |
| 2001 | 15 |
| 2002 | 20 |
| 2003 | 55 |
| 2004 | 10 |
| 2004 | 49 |
| 2005 | 15 |
| 2005 | 100 |
| 2006 | 162 |
| 2007 | 6 |
| 2007 | 197 |
| 2008 | 18 |
| 2008 | 255 |
| 2009 | 13 |
| 2009 | 248 |
| 2010 | 8 |
| 2010 | 274 |
| 2011 | 19 |
| 2011 | 312 |
| 2012 | 20 |
| 2012 | 361 |
| 2013 | 12 |
| 2013 | 384 |
| 2014 | 22 |
| 2014 | 411 |
| 2015 | 22 |
| 2015 | 506 |
| 2016 | 20 |
| 2016 | 592 |
| 2017 | 19 |
| 2017 | 555 |
| 2018 | 36 |
| 2018 | 566 |
| 2019 | 25 |
| 2019 | 536 |
| 2020 | 15 |
| 2020 | 411 |
| 2021 | 16 |
| 2021 | 453 |
| 2022 | 12 |
| 2022 | 437 |
| 2023 | 526 |
| 2024 | 460 |