It would be sorta hard to count. You couldn't say add the subtract the total from the year w/ no coaster from the year w/ the coaster, because even if a new roller coaster isn't built more people will come to the same park as the world is more crowded each year. Ya get what I am saying? ------------- Ricochet: Bouncing to you in 2002, Only at King's Dominion!
I'm not sure what the number one coaster in this case would be, but I do know of a number of coasters that have pretty much single handedly skyrocketed a park's attendance. Here's the list.
Batman- SFGAm Magnum XL-200- Cedarpoint Millennium Force- Cedarpoint Superman: The Escape- SFMM Tower of Terror- Dreamworld Australia Medusa- SFGAdv (although part of a year where many rides were added, this one easily brought in the most people)
That's the recent crop, if you want, just say so and I can give some oldeer ones that made a big difference.
I don't know haow much what coaster has boosted which parks attendance, but you can bet that the parks have it calculated pretty darn close. If you don't do that when you're spending millions on a ride, you wind up out of business.
Can anyone say Shivering Timbers? I am sure that ST helped boost MA's attendance, in the enthusiast category.
I can think of one coaster that didn't do too much for the park, Son of Beast. There wasn't as big as a fuss over this ride as there was over MF. It's too bad, because I think that SOB is great. I may be wrong, was attendance up that year?