Off-line debit card transaction volume will exceed $100 billion this year according to mid-year 'VISA Check Card' and MasterMoney' data. As of June 30 there were 67.6 million debit cardholders in the U.S. generating more than one billion transactions since the first year, representing slightly less than $50 billion in year-to-date card volume. While the number of cardholders is growing about 42% annually, debit card volume is nearly doubling this year. Truly this is a market segment that is no longer in infancy. Total U.S. card volume, including debit and credit cards, will exceed $1 trillion this year. Credit card volume is growing about 14.5% annually according to CardData's mid-year computations.