How much yearly income would you consider low, middle, and upper class?

<p>$0 to $25,000 (28.22%)
$25,000 to $50,000 (26.65%)
National Median $44,389
$50,000 to $75,000 (18.27%)
$75,000 to $100,000 (10.93%)
$100,000 or more (15.73%)</p>