Here's an eye opener (Model Airplane News 1951), in 1951 at a contest in Long Island NY, there were 158 entries in Navy carrier, 230 entries in Stunt, 236 entries in just 1/2A speed, 270 in A Speed, 291 in B speed, 175 in C speed, 216 in D speed and check this out, 101 entries in Jet Speed. Here is the real kicker; it was annual one day contest. Hard to imagine today.
I saw this posted on another site and thought I would share here. Kind of amazes me to think about that many entries.
Mike