| Year | Visitors |
|---|---|
| 2019 | 159,445 |
| 2018 | 145,929 |
| 2017 | 159,595 |
| 2016 | 143,843 |
| 2015 | 87,513 |
| 2014 | 120,122 |
| 2013 | 120,340 |
| 2012 | 109,685 |
| 2011 | 120,166 |
| 2010 | 121,208 |
| 2009 | 122,970 |
| 2008 | 104,913 |
| 2007 | 115,524 |
| 2006 | 134,045 |
| 2005 | 84,301 |
| 2004 | 126,247 |
| 2003 | 107,114 |
| 2002 | 101,620 |
| 2001 | 119,738 |
| 2000 | 95,619 |
| 1999 | 82,223 |
| 1998 | 93,725 |
| 1997 | 70,716 |
| 1996 | 62,614 |
| 1995 | 67,949 |
| 1994 | 67,756 |
| 1993 | 54,669 |
| 1992 | 40,018 |
| 1991 | 30,975 |
| 1990 | 23,223 |
| 1989 | 25,445 |
| 1988 | 26,257 |
| 1987 | 20,312 |
| 1986 | 16,508 |
| 1985 | 12,332 |