Visitation Statistics by Year |
| 2010 | 428,524 |
| 2009 | 432,639 |
| 2008 | 400,381 |
| 2007 | 409,560 |
| 2006 | 407,367 |
| 2005 | 413,786 |
| 2004 | 419,599 |
| 2003 | 457,631 |
| 2002 | 476,259 |
| 2001 | 455,621 |
| 2000 | 469,303 |
| 1999 | 514,418 |
| 1998 | 522,076 |
| 1997 | 540,797 |
| 1996 | 557,217 |
| 1995 | 588,609 |
| 1994 | 617,087 |
| 1993 | 687,161 |
| 1992 | 688,742 |
| 1991 | 679,450 |
| 1990 | 747,016 |
| 1989 | 792,378 |
| 1988 | 786,135 |
| 1987 | 781,300 |
| 1986 | 752,552 |
| 1985 | 732,482 |
| 1984 | 712,989 |
| 1983 | 712,247 |
| 1982 | 781,963 |
| 1981 | 771,766 |
| 1980 | 672,963 |
| 1979 | 721,647 |
| 1978 | 867,277 |
| 1977 | 862,800 |
| 1976 | 876,500 |
| 1975 | 790,000 |
| 1974 | 672,400 |
| 1973 | 840,100 |
| 1972 | 856,086 |
| 1971 | 791,600 |
| 1970 | 712,700 |
| 1969 | 672,900 |
| 1968 | 668,400 |
| 1967 | 630,800 |
| 1966 | 604,800 |
| 1965 | 591,000 |
| 1964 | 588,000 |
| 1963 | 586,600 |
| 1962 | 556,000 |
| 1961 | 590,000 |
| 1960 | 537,000 |
| 1959 | 483,900 |
| 1958 | 435,200 |
| 1957 | 451,100 |
| 1956 | 455,000 |
| 1955 | 466,200 |
| 1954 | 444,300 |
| 1953 | 510,318 |
| 1952 | 531,751 |
| 1951 | 493,618 |
| 1950 | 467,283 |
| 1949 | 431,187 |
| 1948 | 435,481 |
| 1947 | 405,266 |
| 1946 | 380,465 |
| 1945 | 193,237 |
| 1944 | 122,467 |
| 1943 | 89,128 |
| 1942 | 124,809 |
| 1941 | 285,418 |
| 1940 | 236,653 |
| 1939 | 212,348 |
| 1938 | 205,765 |
| 1937 | 201,333 |
| 1936 | 148,129 |
| 1935 | 113,753 |
| 1934 | 88,349 |
| 1933 | 53,768 |
| 1932 | 61,474 |
| 1931 | 81,275 |
| 1930 | 90,104 |
| 1929 | 76,822 |
| 1928 | 46,335 |
| 1927 | 26,436 |
| 1926 | 10,904 |
| 1925 | 1,794 |
| 1924 | 1,280 |
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