| Year | |
|---|---|
| 1993 | 10,426 |
| 1994 | 12,114 |
| 1995 | 14,322 |
| 1996 | 13,485 |
| 1997 | 12,756 |
| 1998 | 13,062 |
| 1999 | 12,763 |
| 2000 | 10,657 |
| 2001 | 8,840 |
| 2002 | 8,701 |
| 2003 | 8,946 |
| 2004 | 9,270 |
| 2005 | 8,610 |
| 2006 | 8,534 |
| 2007 | 9,783 |
| 2008 | 12,051 |
| 2009 | 14,574 |
| 2010 | 15,118 |
| 2011 | 15,805 |
| 2012 | 16,015 |
| 2013 | 16,713 |
| 2014 | 17,551 |
| 2015 | 19,834 |
| 2016 | 21,001 |
| 2017 | 24,195 |