Annual cost in US dollars for continuing education for Physical, Occupational Therapists, Athletic Trainers?

i do not know if there is an actual cost. Some people just naturally go to more than others. Not all states have requirements. I spend about 2,000 a year. I know people who spend about 100. I try to go to 2-3 weekend courses a year. They are between 400-600 a weekend plus travel ect. My employer remiburses a small amount.