| Year | Visitors |
|---|---|
| 2019 | 1,088,528 |
| 2018 | 892,044 |
| 2017 | 759,656 |
| 2016 | 905,418 |
| 2015 | 772,579 |
| 2014 | 710,612 |
| 2013 | 725,917 |
| 2012 | 742,200 |
| 2011 | 728,353 |
| 2010 | 682,736 |
| 2009 | 288,458 |
| 2008 | 253,333 |
| 2007 | 290,701 |
| 2006 | 265,022 |
| 2005 | 279,581 |
| 2004 | 313,497 |
| 2003 | 346,542 |
| 2002 | 387,216 |
| 2001 | 331,343 |
| 2000 | 273,696 |
| 1999 | 333,944 |
| 1998 | 425,209 |
| 1997 | 332,164 |
| 1996 | 313,565 |
| 1995 | 344,902 |
| 1994 | 348,257 |
| 1993 | 311,716 |
| 1992 | 330,015 |
| 1991 | 298,948 |
| 1990 | 0 |