Visitation Statistics by Year |
| 2010 | 435,908 |
| 2009 | 436,241 |
| 2008 | 436,715 |
| 2007 | 417,560 |
| 2006 | 392,537 |
| 2005 | 393,381 |
| 2004 | 371,706 |
| 2003 | 386,986 |
| 2002 | 367,078 |
| 2001 | 368,592 |
| 2000 | 401,558 |
| 1999 | 446,160 |
| 1998 | 436,524 |
| 1997 | 432,697 |
| 1996 | 447,527 |
| 1995 | 448,769 |
| 1994 | 429,921 |
| 1993 | 434,844 |
| 1992 | 395,698 |
| 1991 | 339,315 |
| 1990 | 276,831 |
| 1989 | 257,411 |
| 1988 | 212,100 |
| 1987 | 172,384 |
| 1986 | 172,987 |
| 1985 | 116,672 |
| 1984 | 102,533 |
| 1983 | 100,022 |
| 1982 | 97,079 |
| 1981 | 89,915 |
| 1980 | 56,505 |
| 1979 | 74,545 |
| 1978 | 85,932 |
| 1977 | 75,500 |
| 1976 | 80,000 |
| 1975 | 71,700 |
| 1974 | 59,000 |
| 1973 | 62,500 |
| 1972 | 60,639 |
| 1971 | 55,400 |
| 1970 | 33,400 |
| 1969 | 26,000 |
| 1968 | 26,300 |
| 1967 | 23,200 |
| 1966 | 20,200 |
| 1965 | 19,400 |
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