137: United States - Maryland

43: United States - Virginia

15: United States - Pennsylvania

12: United States - Delaware

7: United States - District of Columbia

3: United States - Maryland

2: United States - Florida

2: United States - New York

2: United States - West Virginia

1: India - West Bengal

1: Italy - Sardegna

1: Chinese Taipei - Chiayi

1: United States - Georgia

1: United States - New Jersey

1: United States - Tennessee