| Year | Visitors |
|---|---|
| 2019 | 158,924 |
| 2018 | 154,368 |
| 2017 | 161,526 |
| 2016 | 157,440 |
| 2015 | 174,433 |
| 2014 | 164,063 |
| 2013 | 137,904 |
| 2012 | 114,678 |
| 2011 | 105,356 |
| 2010 | 134,662 |
| 2009 | 123,290 |
| 2008 | 115,066 |
| 2007 | 110,639 |
| 2006 | 107,792 |
| 2005 | 116,194 |
| 2004 | 137,170 |
| 2003 | 151,127 |
| 2002 | 115,893 |
| 2001 | 118,374 |
| 2000 | 76,557 |
| 1999 | 109,008 |
| 1998 | 95,001 |
| 1997 | 105,707 |
| 1996 | 101,158 |
| 1995 | 100,366 |
| 1994 | 101,492 |
| 1993 | 90,316 |
| 1992 | 75,916 |
| 1991 | 69,119 |
| 1990 | 78,993 |
| 1989 | 52,554 |
| 1988 | 23,546 |