I did not realize that I was in the top 25% of income tax filers in 2005.

Percentiles Ranked by AGI	Adjusted Gross Income Threshold on Percentiles	Percentage of Federal Personal Income Tax Paid
Top 1%	$364,657	39.38%
Top 5 %	$145,283	59.67%
Top 10%	$103,912	70.30%
Top 25%	$62,068	85.99%
Top 50%	$30,881	96.93%
Bottom 50%	$30,881	3.07%

Source: IRS (Tax Year 2005)