| Year | Visitors |
|---|---|
| 2019 | 715,911 |
| 2018 | 1,035,737 |
| 2017 | 1,477,913 |
| 2016 | 989,424 |
| 2015 | 903,161 |
| 2014 | 723,923 |
| 2013 | 658,065 |
| 2012 | 600,083 |
| 2011 | 786,151 |
| 2010 | 616,635 |
| 2009 | 1,475,182 |
| 2008 | 1,178,845 |
| 2007 | 1,058,774 |
| 2006 | 1,061,387 |
| 2005 | 1,204,270 |
| 2004 | 1,333,967 |
| 2003 | 723,575 |
| 2002 | 853,993 |
| 2001 | 1,401,108 |
| 2000 | 1,219,143 |
| 1999 | 1,363,332 |
| 1998 | 1,333,875 |
| 1997 | 1,846,879 |