Full House ran on TV as a regularly scheduled show from 1987 to 1994. During that time-frame, the show averaged #27, with viewership of about 14 million households. I don't know if the show is still on today, but if it is I'm sure the numbers are a lot less.
I don't know about America but 28.6% of all Philippines like it for some reason. Maybe because John Stamos has black hair. They probably think that it is really cool to have a Phillipino TV Star. As of Feb 18, 2010.