| Year | |
|---|---|
| 1993 | 0 |
| 1994 | 2,181 |
| 1995 | 1,934 |
| 1996 | 2,038 |
| 1997 | 2,064 |
| 1998 | 1,865 |
| 1999 | 2,093 |
| 2000 | 2,791 |
| 2001 | 2,089 |
| 2002 | 1,865 |
| 2003 | 2,064 |
| 2004 | 2,038 |
| 2005 | 1,934 |
| 2006 | 2,181 |
| 2007 | 2,594 |
| 2008 | 3,124 |
| 2009 | 3,753 |
| 2010 | 3,809 |
| 2011 | 4,054 |
| 2012 | 4,659 |
| 2013 | 4,914 |
| 2014 | 5,121 |
| 2015 | 5,645 |
| 2016 | 5,522 |
| 2017 | 6,581 |