[NSchandler]

[url=http://www.taxpolicycenter.org/TaxFacts/Tfdb/TFTemplate.cfm?DocID=221&Topic2id=20&Topic 3id=22[/url]

Here is the link for 2000 data.

The numbers, in summary (all 2000 numbers):

Top 1% of income earners paid 29.5% of all income taxes.
Top 5% of income earners paid 49.1% of all income taxes.
Top 10% of income earners paid 61.3% of all income taxes.

For those who want to claim that the rich don't pay their "fair share" of taxes, consider this:

Richest quintile paid 13.7% of their income in the form of income tax, poorest quintile "paid" -2.4%. Second lowest quintile paid only 0.8%. As a matter of fact, the bottom 40% of taxpayers did not pay any income tax as a whole.

I can't find more recent data off the top of my head, but I do know that actually following the Bush tax cuts, the rich pay a higher percentage of total income taxes. Yes, he cut taxes for the rich, but he cut taxes *more* for the poor (in percentage terms).