I'm on the road right now, with no access to my data. But IIRC, RVs compose about 20-25% of new homebuilts. However, Carbon Cub is equal to the RV-7 (The most common new RV) in last year's statistics, as far as new airplanes added in 2020.
I've discussed homebuilt fleet sizes at:
http://eaaforums.org/showthread.php?...ft-Fleet-Sizes
Ron Wanttaja