Visitation Statistics by Year |
| 2010 | 2,492,670 |
| 2009 | 2,589,288 |
| 2008 | 2,828,233 |
| 2007 | 2,486,656 |
| 2006 | 2,468,816 |
| 2005 | 2,533,827 |
| 2004 | 3,306,175 |
| 2003 | 2,879,591 |
| 2002 | 3,217,935 |
| 2001 | 3,123,353 |
| 2000 | 3,324,918 |
| 1999 | 3,324,284 |
| 1998 | 3,467,107 |
| 1997 | 3,527,837 |
| 1996 | 3,455,878 |
| 1995 | 3,195,207 |
| 1994 | 3,266,401 |
| 1993 | 2,266,139 |
| 1992 | 1,430,382 |
| 1991 | 1,358,984 |
| 1990 | 1,200,622 |
| 1989 | 1,159,648 |
| 1988 | 1,229,717 |
| 1987 | 1,113,405 |
| 1986 | 1,042,148 |
| 1985 | 1,004,858 |
| 1984 | 1,018,828 |
| 1983 | 939,562 |
| 1982 | 717,815 |
| 1981 | 596,300 |
| 1980 | 563,300 |
| 1979 | 543,025 |
| 1978 | 496,400 |
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