| Year | |
|---|---|
| 1993 | 0 |
| 1994 | 2,698 |
| 1995 | 3,053 |
| 1996 | 3,355 |
| 1997 | 2,900 |
| 1998 | 2,715 |
| 1999 | 2,636 |
| 2000 | 3,235 |
| 2001 | 2,636 |
| 2002 | 2,714 |
| 2003 | 2,900 |
| 2004 | 3,355 |
| 2005 | 3,053 |
| 2006 | 2,700 |
| 2007 | 2,701 |
| 2008 | 2,944 |
| 2009 | 3,695 |
| 2010 | 4,373 |
| 2011 | 4,746 |
| 2012 | 4,669 |
| 2013 | 4,860 |
| 2014 | 4,859 |
| 2015 | 4,912 |
| 2016 | 5,090 |
| 2017 | 6,426 |