The way I read it, the two facts are redundant, they mean that virtually everybody with credit card debt carries a balance from month to month. That's tautologically true.
I would guess that more than 1/3 of Americans have a credit. card account (not necessarily debt).
The most recent Survey of Consumer Payment Choice estimates that there are 178M card holders. The 2009 Survey of Consumer Finances (2) estimates that percentage of card holders of "bank-type" (eg: not Macy's) cards that revolve balances is just under 50%. With store cards, this number is right around 100M.
1/3 of Americans carry a balance from month to month (revolving) = ~100 million people; sorry layout is confusing but this is in fact correct. Of course, more than 100MM actually have at least one credit card but not all of them carry balances.
Simply put, way more than 100MM people have credit cards, only ~100MM or 1/3rd carry balances from month to month.
1. Isn't carrying a balance from month to month the definition of "credit card debt"?
2. As of July 2009, the US population is about 307 million people.
That would mean that virtually everybody with a credit card carries a balance from month to month. That's simply not true.