By 1999, the park had an annual attendance of 200,000 people.
He wants to see annual attendance, 265,000 last year, return to more than a million, as it was half a century go.
The event began in 1988, and has an annual attendance of 65,000.
For a while in the 1970's, annual attendance reached 260,000.
Over the last 15 years, annual attendance has doubled to more than 800,000.
Since the museum opened two years ago, annual attendance has run between 175,000 and 220,000 visitors.
The study estimated the new center could draw an annual attendance of 1.5 million.
Projected annual attendance was 50,000 but it never reached above 15,000.
But annual attendance remains stuck at around 300,000, less than a third of what it was in the 1930's.
The campus has an average annual attendance of approximately 9,000.