| year_label | year | count |
|---|---|---|
| 2000 | 2000 | 4 |
| 2001 | 2001 | 5 |
| 2002 | 2002 | 94 |
| 2003 | 2003 | 311 |
| 2004 | 2004 | 555 |
| 2005 | 2005 | 754 |
| 2006 | 2006 | 955 |
| 2007 | 2007 | 1166 |
| 2008 | 2008 | 1168 |
| 2009 | 2009 | 1720 |
| 2010 | 2010 | 2279 |
| 2011 | 2011 | 2019 |
| 2012 | 2012 | 2591 |
| 2013 | 2013 | 2141 |
| 2014 | 2014 | 2778 |
| 2015 | 2015 | 2664 |
| 2016 | 2016 | 3503 |
| 2017 | 2017 | 3394 |
| 2018 | 2018 | 3344 |
| 2019 | 2019 | 4077 |
| 2020 | 2020 | 2372 |