Disco08 said:Being that most have the conspiracy theories have surfaced fairly recently I'd say the result might be a little different now than in 1999.
I'd agree based on perception, though I doubt the figures would change markedly if the survey was repeated. Every major world-shaping event seems to attract its share of people who question the historic version of events, but I can't think of any specific conspiracy theories that have gained popular acceptance (~50% or higher).