| Year | Count |
|---|---|
| 1978 | 12 |
| 1979 | 18 |
| 1994 | 83 |
| 1995 | 104 |
| 1996 | 55 |
| 1997 | 135 |
| 1998 | 105 |
| 1999 | 85 |
| 2000 | 127 |
| 2001 | 254 |
| 2002 | 353 |
| 2003 | 235 |
| 2004 | 229 |
| 2005 | 214 |
| 2006 | 215 |
| 2007 | 188 |
| 2008 | 186 |
| 2009 | 252 |
| 2010 | 236 |
| 2011 | 296 |
| 2012 | 278 |
| 2013 | 306 |
| 2014 | 247 |
| 2015 | 241 |
| 2016 | 708 |
| 2017 | 642 |
| 2018 | 681 |
| 2019 | 344 |
| 2020 | 354 |
| 2021 | 390 |
| 2022 | 336 |
| 2023 | 286 |
| 2024 | 340 |