New York has, or has had, 16 of these. Massachusetts and Virginia has or has had 7 each. Pennsylvania has or has had 5. California, Delaware, D.C., and Maine: 3 each. Connecticut, Illinois, Maryland, Ohio and South Carolina: 2 each. Florida, Georgia, Indiana, Kentucky, Louisiana, Michigan, Minnesota, Nebraska, New Jersey, Tennessee, and Texas: 1 each.
This is a comprehensive list, and unique to the United States of America. (The total count is 68. Thanks to Mike Schilling for flushing out my oversight on the initial post.)
