Visitation Statistics by Year |
| 2008 | 9,044,010 |
| 2007 | 9,372,253 |
| 2006 | 9,289,215 |
| 2005 | 9,192,477 |
| 2004 | 9,167,046 |
| 2003 | 9,366,845 |
| 2002 | 9,316,420 |
| 2001 | 9,197,697 |
| 2000 | 10,175,812 |
| 1999 | 10,283,598 |
| 1998 | 9,989,395 |
| 1997 | 9,965,075 |
| 1996 | 9,265,667 |
| 1995 | 9,080,420 |
| 1994 | 8,628,174 |
| 1993 | 9,283,848 |
| 1992 | 8,931,690 |
| 1991 | 8,654,459 |
| 1990 | 8,151,769 |
| 1989 | 8,333,553 |
| 1988 | 8,770,781 |
| 1987 | 10,209,841 |
| 1986 | 9,836,306 |
| 1985 | 9,319,290 |
| 1984 | 8,508,390 |
| 1983 | 8,435,475 |
| 1982 | 8,177,869 |
| 1981 | 8,312,884 |
| 1980 | 8,440,953 |
| 1979 | 8,019,788 |
| 1978 | 8,695,534 |
| 1977 | 9,173,600 |
| 1976 | 8,991,500 |
| 1975 | 8,541,500 |
| 1974 | 7,807,800 |
| 1973 | 7,586,300 |
| 1972 | 8,034,753 |
| 1971 | 7,173,000 |
| 1970 | 6,778,500 |
| 1969 | 6,331,100 |
| 1968 | 6,667,100 |
| 1967 | 6,710,100 |
| 1966 | 6,466,100 |
| 1965 | 5,954,900 |
| 1964 | 5,321,100 |
| 1963 | 5,258,700 |
| 1962 | 5,209,800 |
| 1961 | 4,762,100 |
| 1960 | 4,528,600 |
| 1959 | 3,162,300 |
| 1958 | 3,168,900 |
| 1957 | 2,943,700 |
| 1956 | 2,885,800 |
| 1955 | 2,581,500 |
| 1954 | 2,526,900 |
| 1953 | 2,250,772 |
| 1952 | 2,322,152 |
| 1951 | 1,945,100 |
| 1950 | 1,843,620 |
| 1949 | 1,539,641 |
| 1948 | 1,469,749 |
| 1947 | 1,204,017 |
| 1946 | 1,157,930 |
| 1945 | 750,690 |
| 1944 | 534,586 |
| 1943 | 383,116 |
| 1942 | 728,706 |
| 1941 | 1,310,101 |
| 1940 | 860,960 |
| 1939 | 761,567 |
| 1938 | 694,634 |
| 1937 | 727,243 |
| 1936 | 602,222 |
| 1935 | 500,000 |
| 1934 | 420,000 |
| 1933 | 375,000 |
| 1932 | 300,000 |
| 1931 | 154,000 |
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