in marketing research, we learned how to use census data. some income facts:

My high school school district:
$100,000 to $149,999 - 27.5%
$150,000 or more - 46.0%

My college school district:
$100,000 to $149,999 - 19.6%
$150,000 or more - 15.5%

My grad school disctrict:
$35,000 to $49,999 - 14.5%
$50,000 to $74,999 - 21.3%
$75,000 to $99,999 - 14.7%
$100,000 to $149,999 - 14.9%
$150,000 or more - 11.9%

Not a very good trend.