Let's make it easier:
Percentage difference won among those with only a grade school education:
1960: Kennedy +10%
1964: Johnson +32%
1968: Humphrey +19%
1972: Nixon +2%
1976: Carter +17%
1980: Carter +12%
1984: Mondale +2%
1988: Dukakis +10%
1992: Clinton +12% (+28% over Bush)
1996: Clinton +16% (+31% over Dole)
2000: Gore +8% (High School or less)
2004: Kerry +8% (High School or less)
Election Polls -- Vote by Groups, 1960-1964
Something about the Democratic party which consistently appeals to the least educated.
Now let's look at the college educated:
1960: Nixon +22%
1964: Johnson +4%
1968: Nixon +17%
1972: Nixon +26%
1976: Ford +13%
1980: Reagan +8%
1984: Reagan +22%
1988: Bush +16%
1992: Clinton +3% (over Bush, -14% overall)
1996: Clinton +2% (over Dole, -6% overall)
2000: Bush +11% (college grads only)
2004: Bush +16% (college grads only)
To be fair,
2000: Gore +10% (post grads)
2004: Kerry +6% (post grads)