It's amazing how the 1/3 apportionment holds up. During the American Revolution... 1/3 were liberals who joined and fought for revolution... 1/3 were "independents" and 1/3 were conservatives who didn't want anything to change and aided the British.
Here we are today and the same holds up. 1/3 of conservatives can't stand change... 1/3 don't give a hoot... and 1/3 are liberals. Weird ain't it?