31 Percent

What does a 31% approval rating mean? I recently campaigned in a local election with the platform of "I'm not qualified for the job. You would be a fool to vote for me." I got 31% of the vote. Clearly 31% of the voters don't really care or are clueless. So who is a remaining supporter of Bush (hswib)? From here it looks like the clueless and uncaring.