I understand about 12 people are killed a year flying. There are about 30,000 PPLs (but not all are current) and about 15,000 commercial pilots (some of whom must be involved with GA). Most current PPLs seem to fly less than 30 hours a year. It must be possible to work out some statistics.
However, I also understand that light aircraft are less dangerous than helicopters, gliders and microlights - in that order. Aerobatics and flying historic aircraft also seem to carry more risk.
Friends of mine dive and say one person a month dies just at the site where they dive. Other friends ride horses and although it is rare for people to get killed just 'riding out', cross country jumping is dangerous. Apparently angling is dangerous, but why I am not sure - I suspect the anglers' neglected wives push them in the water!!