What's in a number; Part 3 of an ongoing series.

$2.2 Trillion dollars ; the amount in purchases and cash advances made by Americans on their credit cards in just the last year alone.

315% ; the amount credit card debt has grown from 1989 to 2006.

What's in a number; Part 2 of an ongoing series.

45% - the amount the price of an average home has risen in the US in the last six years alone.

4% - the amount average wages have dropped in the US since 2000.

What's in a number; Part 1 of an ongoing series.

22 Million - the number of votes cast in Democratic primaries so far.

14.1 Million - the number of votes cast in Republican primaries so far.

These numbers do not include caucuses.