Peculiar statistical calculations

Here are some interesting statistics from the data found at http://www.irs.gov/pub/irs-soi/04in34tr.xls

0.82% of the population earn an average of $1,134,091.34 and pay 30.03% of the federally collected taxes.
1.33% of the population earn an average of $ 297,026.42 and pay 10.29% of the federally collected taxes.
1.85% of the population earn an average of $ 179,246.68 and pay 7.04% of the federally collected taxes.
0.02% of the population earn an average of $ 154,667.25 and pay 0.05% of the federally collected taxes.
1.64% of the population earn an average of $ 142,875.26 and pay 4.97% of the federally collected taxes.
6.28% of the population earn an average of $ 105,542.01 and pay 10.53% of the federally collected taxes.
7.68% of the population earn an average of $ 77,927.52 and pay 6.29% of the federally collected taxes.
15.16% of the population earn an average of $ 77,661.69 and pay 17.47% of the federally collected taxes.
39.51% of the population earn an average of $ 41,299.26 and pay 12.47% of the federally collected taxes.
2.60% of the population earn an average of $ 24,363.95 and pay 0.17% of the federally collected taxes.
1.02% of the population earn an average of $ 22,324.30 and pay 0.04% of the federally collected taxes.
21.95% of the population earn an average of $ 18,435.92 and pay 0.62% of the federally collected taxes.
0.11% of the population earn an average of $ 13,970.83 and pay 0.04% of the federally collected taxes.
0.00% of the population earn an average of $ 7,137.90 and pay 0.00% of the federally collected taxes.
0.01% of the population earn an average of $ (24,573.61) and pay 0.00% of the federally collected taxes.

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