There were a few other exceptions given
In addition to the 54 Therapeutic Use Exemptions for ADHD, there was one for hypertension, one for sleep disorder and one for hormone function.
I am a little surprised to see it continue to decrease after the huge fall off. Given the amount of kids on it as more people make the jump from the minors I would have figured that would have kept the level or even slightly increased it given how long it will take for the regular population to catch up to to the pros.