clipped from: newsbusters.org   
As reported by the Wall Street Journal

Every Democrat running for President wants to raise taxes on "the rich," but they will have to do something miraculous to outtax President Bush. Based on the latest available tax data, no Administration in modern history has done more to pry tax revenue from the wealthy.

the news is that the richest 1% paid about 39% of all income taxes that year. The richest 5% paid a tad less than 60%, and the richest 10% paid 70%. These tax shares are all up substantially since 1990, and even somewhat since 2000. Meanwhile, Americans with an income below the median -- half of all households -- paid a mere 3% of all income taxes in 2005.

[T]he share of taxes paid by the top 1% has kept climbing this decade -- to 39.4% in 2005, from 37.4% in 2000. The share paid by the top 5% has increased even more rapidly. In other words, despite the tax reductions of 2001 and 2003, the rich saw their share of taxes paid rise at a faster rate than their share of income.