Political ideology is not found to be correlated with social class; however, a statistical relationship is seen between the level of one's educational attainment and one's likelihood of subscribing to a particular political ideology. In terms of income, liberals tend to be tied with pro-business conservatives. Most mass affluent households tend to be more right-leaning on fiscal issues but more left-leaning on social issues. The majority, between 50% and 60%, of households with incomes above $50,000 overall, not all of whom are upper middle class, supported the Republican Party in the 2000, 2004, and 2006 elections. Those with postgraduate degrees in education statistically favor the Democratic Party. For example, in 2005, 72% of surveyed full-time faculty members at four-year institutions, the majority of whom would be considered upper middle class, identified themselves as liberal.