Interesting statistics. I guess that you have lots of glider
operations at what the FAA classify as "airports".

There are a number of airports shown on the charts as gliderports but
listed in the database as airports. Crystal (CA), Adelnto (CA), and
Pleasant Valley (AZ, aka Turf Soaring) among them. I'm curious how
many others there are.

btw my first set of numbers were incorrect. Should be:
AIRPORT 13903
BALLOONPORT 15
GLIDERPORT 35
HELIPORT 5683
SEAPLANE BASE 526
STOLPORT 87
ULTRALIGHT 147
Total 20396

2NO