Interesting list,
You have to look at the figures longer term though. Shop I have bought 3 custom rifles from over 20 years builds actions numbered according to ATF rules. Go on the shelf, pulls them off as orders come in and completes the gun.
So he may make up a lot of actions one year then complete rifles off that run the next skewing the figures. He builds about a rifle a week with a 2-3 man shop, not a lot of variation gun to gun caliber & barrel mostly. Some of the work is sub-out most in house. Sheet shows him with 50 in 2012.
Boats