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—About 15 percent get tax breaks for the working poor or low-income parents.

—Almost 3 percent get tax breaks for college tuition or other education expenses.

Who they are:

—The vast majority have below-average earnings: Among all who don’t owe, 9 out of 10 make $50,000 or less.

—But some of the wealthy escape taxes, including about 4,000 households earning more than $1 million a year.

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Associated Press Deputy Polling Director Jennifer Agiesta contributed to this report.