Vast majority are NOT leaving NY, NJ and CA by percentage. Those are heavily populated states which could skew the number.
STATES WITH MOST POPULATION LOSS
1 - Illinois
2 - West Virginia
3 - Connecticut
4 - Mississippi
5/6 - Maine and Vermont
7 - New Mexico
Not a New York, New Jersey or California on the list
https://www.governing.com/topics/mgmt/gov-states-losing-population-census.html