| Year | Count |
|---|---|
| 1978 | 10 |
| 1991 | 5 |
| 1993 | 5 |
| 1994 | 13 |
| 1995 | 28 |
| 1996 | 48 |
| 1997 | 73 |
| 1998 | 116 |
| 1999 | 133 |
| 2000 | 260 |
| 2001 | 378 |
| 2001 | 16 |
| 2002 | 413 |
| 2002 | 8 |
| 2003 | 530 |
| 2004 | 559 |
| 2004 | 6 |
| 2005 | 469 |
| 2006 | 454 |
| 2007 | 463 |
| 2008 | 499 |
| 2009 | 363 |
| 2010 | 297 |
| 2011 | 355 |
| 2012 | 291 |
| 2012 | 5 |
| 2013 | 268 |
| 2013 | 8 |
| 2014 | 206 |
| 2015 | 312 |
| 2016 | 253 |
| 2017 | 260 |
| 2018 | 177 |
| 2019 | 217 |
| 2020 | 201 |
| 2021 | 194 |
| 2022 | 222 |
| 2023 | 210 |
| 2024 | 217 |
| 2024 | 5 |