Visitation Statistics by Year |
| 2010 | 467,612 |
| 2009 | 437,745 |
| 2008 | 686,062 |
| 2007 | 517,442 |
| 2006 | 608,836 |
| 2005 | 563,728 |
| 2004 | 478,304 |
| 2003 | 490,031 |
| 2002 | 513,397 |
| 2001 | 489,343 |
| 2000 | 393,151 |
| 1999 | 442,585 |
| 1998 | 403,239 |
| 1997 | 392,069 |
| 1996 | 338,603 |
| 1995 | 584,519 |
| 1994 | 25,147 |
| 1993 | 19,950 |
| 1992 | 307,512 |
| 1991 | 488,134 |
| 1990 | 573,376 |
| 1989 | 589,957 |
| 1988 | 531,036 |
| 1987 | 607,968 |
| 1986 | 578,013 |
| 1985 | 460,921 |
| 1984 | 340,567 |
| 1983 | 369,082 |
| 1982 | 348,219 |
| 1981 | 305,502 |
| 1980 | 248,071 |
| 1979 | 202,938 |
| 1978 | 177,416 |
| 1977 | 205,900 |
| 1976 | 339,100 |
| 1975 | 351,500 |
| 1974 | 409,700 |
| 1973 | 243,100 |
| 1972 | 78,147 |
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