I have no idea, and neither do you. I have two guesses: 1) better health care diagnostic tools will generally tend to identify more diseases. If better trained medical staff and better equpment is used, it will find more potential issues. 2) As has been discussed in other questions, statistics are in herently suspect. Take Guillian Barre syndrome. It’s pretty rare in general. So a 551% increase could mean that the raw number of people went from 100 to 155. Percentages themselves are not useful – raw numbers are. Or is your thesis that a democratic president in some way is causing disease in people?