How many non-doctors work currently in the healthcare field?

It is amazing to see so many with such a deep desire to fulfill their dreams. I am a 36 y.o chiropractor and educator split between teaching and private practice. I teach at both a chiropractic college and a local medical institution. I plan to return to school and pursue EM or PM&R which I feel will be a much better fit to my interests. Hello and good luck to everyone!