Is there any data that shows the number of people believing in conspiracy theories is actually greater than it was, and that that gap was due to social media?

20 years ago I remember TV shows talking about the moon landing being a hoax, and a decent number of people I talked to at the time believing it. This is just an anecdote, but I've noticed that people make the claim that conspiracy theories are on the rise and I've yet to see hard evidence to support that claim.