Citation?
And really? You think people are really smarter than that? Let's find a few comparison examples for specifically the moon landing, just to use as a tuning fork for this specific poll. Remember, we're looking for somewhere around 12%.
This statistic shows the results of a 2019 survey on conspiracy theories in the United States.
www.statista.com
2019, 11% believe, 11% use the option of 'neither strongly agree or disagree' (that choice wasn't available in the one here)
2013, 7% believe.
Forty years after men first touched the lifeless dirt of the Moon, polling consistently suggests that some 6 percent of Americans believe the landings were faked.
www.nytimes.com
2009, 6% believe.
Fox actually bragged that the show increased skepticism in the moon landing to 20 percent in the U.S.
slate.com
Apparently in 1999, around 11%... after Fox aired a conspiracy theory 'documentary', it jumped briefly to 20%... glad to see they were in the misinformation game so tightly back then too. Shitfucks.
Between 1995 and 2013, the percentage of American adults who believe that the Moon landings were faked in some way has remained stable aroun...
www.moonhoaxdebunked.com
1995, 6% believe, 11% no opinion.
So basically, from the time we started polling such nonsense until around 2013, it was consistently 6-7%, with a fairly large percentage that 'had no opinion' if given the option (which is absurd). After that, the conspiracy engine of the internet was able to take over, and morons are easy marks for such things. I'm sure the percentages of believers of all major conspiracy theories is up.