I dunno if its the case that he doesnt understand statistics. Another theory is:

America has 10 times as much of all the bad things in the world since they have 10 times as many people.

Bill just recognizes that America doesnt have 10 times as much of the good things in the world. Or did i say good? I meant loony left ridiculous things such as hospitals, schools, working stoplights, non-corrupt politicians, calculators... Bill simply opposes that sorta stuff.

The logic may go as follows: correct math has a liberal, unpatrotic bias since it seems to put the US in a bad light. But if 2+2=5 then America once again can become tha greatest nation on earth. So the less we understand, the better we are. The less we know, the more we have.