| Year | |
|---|---|
| 1993 | 0 |
| 1994 | 1,343 |
| 1995 | 1,412 |
| 1996 | 1,570 |
| 1997 | 1,615 |
| 1998 | 1,694 |
| 1999 | 1,866 |
| 2000 | 1,915 |
| 2001 | 1,851 |
| 2002 | 1,678 |
| 2003 | 1,597 |
| 2004 | 1,552 |
| 2005 | 1,400 |
| 2006 | 1,334 |
| 2007 | 1,708 |
| 2008 | 2,196 |
| 2009 | 2,521 |
| 2010 | 2,715 |
| 2011 | 2,495 |
| 2012 | 2,505 |
| 2013 | 2,776 |
| 2014 | 2,999 |
| 2015 | 3,324 |
| 2016 | 3,364 |
| 2017 | 3,585 |