Based on numerous polls that asked if one experienced a paranormal event in their lifetime, it seems roughly 50% across the board claimed they had. This is pretty big, as there are quite a lot of paranormal things that could happen in your life. Things such as seeing ghosts all the way to hearing voices at a cemetery have been reported over the years.
Some of the stuff you see is complete crap though. For example, mediums are not able to talk to the dead. Rather, they use brain tricks into having you fill in gaps for them to improvisationally adjust to. This allows them to make you “think” they are talking to past spirits when they aren’t. It’s clever specialized science that they are using. However, it’s not paranormal.