This is an apples to oranges comparison. Did you read the note at your link:
Originally Posted by Dickieboy
Notes: Effective tax rates are calculated by dividing taxes by comprehensive household income. A household consists of the people who share a housing unit, regardless of their relationships.
The income measure, comprehensive household income, comprises pretax cash income plus income from other sources. Pretax cash income is the sum of wages, salaries, self-employment income, rents, taxable and nontaxable interest, dividends, realized capital gains, cash transfer payments, and retirement benefits plus taxes paid by businesses (corporate income taxes and the employer's share of Social Security, Medicare, and federal unemployment insurance payroll taxes) and employees' contributions to 401(k) retirement plans. Other sources of income include all in-kind benefits (Medicare, Medicaid, employer-paid health insurance premiums, food stamps, school lunches and breakfasts, housing assistance, and energy assistance). Households with negative income are excluded from the lowest income category but are included in the totals.
Income categories are defined by ranking all people by their comprehensive household income adjusted for the size of the household--that is, divided by the square root of the household's size. Quintiles, or fifths, contain equal numbers of people.
Individual income taxes are generally distributed directly to households paying those taxes. Social insurance, or payroll, taxes are distributed to households paying those taxes directly or paying them indirectly through their employers. Corporate income taxes are distributed to households according to their share of capital income. Federal excise taxes are distributed to them according to their consumption of the taxed good or service.
The calculations of income taxes from 2002 through 2014 are based on the assumption that inflation is 2.2 percent per year and that nominal incomes grow at 4.5 percent per year. Most changes to individual income taxes are estimated by simulating the effects of applicable law on 2001 incomes. The reduced tax rate on dividends is allocated to households according to their share of capital income. The estimated effects of partial expensing are allocated to taxpayers on the basis of capital income and noncorporate business income. See the text for further detail.