You need to factor in the teams that register for the season, but do not attend any events – and teams that attend events but did not earn a skills score. I assume (without any evidence) the numbers RECF list are registered teams.
I’m and EP in Texas Region 4, and can tell you that last season there were 117 registered V5RC HS teams, 96 of which competed at an event and 70 that earned a skills score. No idea how typical those proportions are.
According to V5RC HS Opening ceremonies at around 30:30 on the livestream, there were 9565 HS teams this past season. Granted, this is the number for solely HS teams.
Yup. Old dudes chipping in that the RECF-stated team numbers likely include teams that do not play. It is an easier number to determine, and their concern is more oriented to “teams we have reached” than “teams that progressed far enough to compete”.
So, unless the statement explicitly states x number of teams competed last season, you will need to modify the number some amount downward.