Make Sense of This

CNN's exit poll data-2004 votes compared to the 2000 election.

17 % Didn't Vote in 2000:

Went for Kerry 59-39.

38 % Voted for Gore in 2000:

Went for Kerry 91-8.

41% Voted for Bush in 2000:

Went for Bush 90-9.

4% Other Candidate in 2000:

Went for Kerry 65-13.

So Kerry did better among those who didn't vote for Bush or Gore in 2000 by substantial margins, and held more of the Gore vote than Bush held of his vote. AND Gore got more votes in 2000. Yet Bush 'won' by 3%?