| Year | |
|---|---|
| 1993 | 3,748 |
| 1994 | 3,956 |
| 1995 | 4,413 |
| 1996 | 4,191 |
| 1997 | 3,974 |
| 1998 | 3,712 |
| 1999 | 3,542 |
| 2000 | 3,040 |
| 2001 | 2,425 |
| 2002 | 2,200 |
| 2003 | 2,142 |
| 2004 | 2,058 |
| 2005 | 1,911 |
| 2006 | 1,912 |
| 2007 | 2,024 |
| 2008 | 2,067 |
| 2009 | 2,402 |
| 2010 | 2,314 |
| 2011 | 2,313 |
| 2012 | 2,239 |
| 2013 | 2,306 |
| 2014 | 2,312 |
| 2015 | 2,486 |
| 2016 | 2,607 |
| 2017 | 2,951 |