OK, I went back to my archives, I have USDF Yearbooks back to 1995 - and that year it was Black and White! While I don’t have total members, here are some interesting competition numbers:
Grand Prix
1995, 188 competitors, HOTY Udon, median score 67.351
2005, 138 competitors, HOTY Kingston, median score 71.907
2017, 176 competitors, HOTY Verdades, median score 79.940
PSG
1995, 731 competitors, HOTY Blizzard, median score 67.907
2005, 363 competitors, HOTY Marlando, median score 71.000
2017, 502 competitors, HOTY Quintessential Hit, median score 75.066
Third Level
1995, 787 competitors, HOTY Advantige, median score 69.268
2005, 239 competitors, HOTY Rondo, median score 72.334
2017, 369 competitors, HOTY Calexico, media score 75.513
Second Level
1995, 1,333 competitors, HOTY Wendelynne L, median score, 73.605
2005, 258 competitors, HOTY Ravenilli’s Wizard, median score 72.209
2017, 296 competitors, HOTY Au Revoir, median score 74.545
First Level
1995, 2097 competitors, HOTY Wendelynne L, median score 76.364
2005, 55 competitors, HOTY WBR Hannibal, median score 75.741
2017, 503 competitors, HOTY Habanero CWS, median score 80.704
Training Level
1995, 1730 competitors, HOTY Harpsichord, median score 74.215
2005, 687 competitors, HOTY Ruschkoi, median score 75.385
2017, 526 competitors, HOTY Harrold S, median score 82.841
Number of competitors is the number that qualified - aka rode at least 4 shows, at least 8 scores/4 scores for FEI, at least 4 judges. My oldest yearbook is 1995, so I started there, then did my most recent one (2017), then picked about half-way in between (2005) which was BEFORE the recession started. The economy was slowing down, but not too bad yet…
Notice how the numbers have decreased in numbers that are showing!