| Year | Visitors |
|---|---|
| 2019 | 1,210,641 |
| 2018 | 1,447,273 |
| 2017 | 1,366,142 |
| 2016 | 1,224,671 |
| 2015 | 1,220,403 |
| 2014 | 1,311,995 |
| 2013 | 1,091,661 |
| 2012 | 923,054 |
| 2011 | 1,167,393 |
| 2010 | 1,181,960 |
| 2009 | 1,272,212 |
| 2008 | 1,296,990 |
| 2007 | 1,311,087 |
| 2006 | 1,310,321 |
| 2005 | 1,390,443 |
| 2004 | 1,998,903 |
| 2003 | 1,372,109 |
| 2002 | 1,223,863 |
| 2001 | 1,343,067 |
| 2000 | 1,263,838 |
| 1999 | 1,100,142 |
| 1998 | 1,609,738 |
| 1997 | 1,746,476 |