| Year | Visitors |
|---|---|
| 2019 | 1,921 |
| 2018 | 2,077 |
| 2017 | 2,293 |
| 2016 | 2,794 |
| 2015 | 1,261 |
| 2014 | 1,475 |
| 2013 | 1,682 |
| 2012 | 2,045 |
| 2011 | 1,949 |
| 2010 | 2,888 |
| 2009 | 3,357 |
| 2008 | 3,918 |
| 2007 | 4,633 |
| 2006 | 3,990 |
| 2005 | 4,107 |
| 2004 | 4,686 |
| 2003 | 4,675 |
| 2002 | 6,390 |
| 2001 | 7,722 |
| 2000 | 8,488 |
| 1999 | 6,130 |
| 1998 | 5,990 |
| 1997 | 6,892 |
| 1996 | 7,259 |
| 1995 | 7,593 |
| 1994 | 7,152 |
| 1993 | 4,560 |
| 1992 | 5,501 |
| 1991 | 5,788 |
| 1990 | 6,422 |
| 1989 | 7,489 |
| 1988 | 7,243 |
| 1987 | 7,855 |
| 1986 | 7,208 |
| 1985 | 7,433 |
| 1984 | 7,052 |
| 1983 | 7,037 |
| 1982 | 7,693 |
| 1981 | 11,220 |