Credit, debit, and prepaid general purpose and private label cards issued in the United States generated $5.936 trillion in payments for goods and services in 2016. Processing fees, which include interchange, paid by U.S. merchants to handle all card payments, were $88.39 billion. Visa, Mastercard, American Express, Discover, and private label (store, gasoline, medical, etc.) credit cards accounted for a combined $3.347 trillion in purchase volume. This amounted to 56.38% of all card spending including debit and prepaid. Credit cards accounted for $69.79 billion in processing fees, equal to 78...