| Year | Visitors |
|---|---|
| 2019 | 18,537 |
| 2018 | 21,630 |
| 2017 | 21,190 |
| 2016 | 20,830 |
| 2015 | 17,180 |
| 2014 | 16,460 |
| 2013 | 14,016 |
| 2012 | 16,188 |
| 2011 | 14,926 |
| 2010 | 16,362 |
| 2009 | 14,432 |
| 2008 | 14,538 |
| 2007 | 14,909 |
| 2006 | 14,431 |
| 2005 | 13,869 |
| 2004 | 13,938 |
| 2003 | 11,473 |
| 2002 | 14,573 |
| 2001 | 11,756 |
| 2000 | 9,771 |
| 1999 | 7,442 |
| 1998 | 8,069 |
| 1997 | 6,032 |
| 1996 | 4,346 |
| 1995 | 4,495 |
| 1994 | 3,869 |
| 1993 | 3,341 |
| 1992 | 4,712 |
| 1991 | 5,987 |