Tell me more.
Dr John Mack of Harvard (now deceased) has written much on this topic.
That was a very well designed representative sample survey. The UFO part was but a small subset of a larger commissioned poll that was a bit weighted by surveying more decision makers, opinion shapers than would have been strictly representative of the general population.
The questions also were not obviously about UFOs. They merely included factors which were known to be true of abductees that were consistent across many known abductions. e.g. memory issues; missing time issues; physiological issues; psychological factors etc. If we recall correctly, there were 11 or so questions that were about the UFO stuff.
Extrapolating from those answers to the general population--quite reasonable given the quality and design of the survey--it was concluded that a conservative estimate was that there were at least 3 million abductees in the USA alone. We vaguely recall similar results for Canada--with its much smaller population.
There have been other polls since then. There was a period when there seemed to be a lot less abductions going on routinely. We don't recall those dates.
Nevertheless, it appears that at least 1.5 and likely closer to 3% of the general population have been abducted by UFOs.
That times the 350,000,000 general population would actually give a figure of 5,250,000 to 10,500,000 million abductees in the USA alone.
Seriously.