So, for instance what are the number of people carrying 3 or more credit cards? what was their average transaction per month? what was their credit card balance?
Try this site:
http://www.cardweb.com/cardtrak/news/2004/may/13a.html
http://www.cardweb.com/cardtrak/
http://answers.google.com/answers/threadview?id=95380
http://www.bankrate.com/brm/news/cc/20000815b.asp