| Year | Visitors |
|---|---|
| 2019 | 1,770,794 |
| 2018 | 1,800,329 |
| 2017 | 1,932,762 |
| 2016 | 1,813,222 |
| 2015 | 1,833,085 |
| 2014 | 1,999,232 |
| 2013 | 1,712,858 |
| 2012 | 858,700 |
| 2011 | 1,240,717 |
| 2010 | 1,363,389 |
| 2009 | 3,678,876 |
| 2008 | 2,559,653 |
| 2007 | 2,513,639 |
| 2006 | 3,803,244 |
| 2005 | 1,660,876 |
| 2004 | 1,378,172 |
| 2003 | 1,401,221 |
| 2002 | 1,724,138 |
| 2001 | 1,860,851 |
| 2000 | 2,816,985 |
| 1999 | 1,432,569 |
| 1998 | 1,264,132 |
| 1997 | 1,602,145 |