| Registrations | Change % | |
|---|---|---|
| 2002 | 446 | - |
| 2003 | 549 | 23.1% |
| 2004 | 689 | 25.5% |
| 2005 | 1,084 | 57.3% |
| 2006 | 1,141 | 5.3% |
| 2007 | 1,798 | 57.6% |
| 2008 | 1,092 | -39.3% |
| 2009 | 776 | -28.9% |
| 2010 | 780 | 0.5% |
| 2011 | 788 | 1.0% |
| 2012 | 663 | -15.9% |
| 2013 | 781 | 17.8% |
| 2014 | 1,074 | 37.5% |
| 2015 | 1,256 | 16.9% |
| 2016 | 1,177 | -6.3% |
| 2017 | 1,044 | -11.3% |
| 2018 | 896 | -14.2% |
| 2019 | 907 | 1.2% |
| 2020 | 402 | -55.7% |