It's more active jumpers over their jumping career than just people who try it once. It varies wildly jumper to jumper based on the types of jumps done (cliffs are more deadly than bridges) and how often. Most people jump for a period of 3-6 years and quit.

My wife and I were pretty active jumping in the era of wingsuit videos on YouTube. In her first year we had one good friend die and 9 people we'd met or hung out with a short time. It is basically comparable in danger to spaceflight.