1969-1971: Let's see if we can make a
show on a budget of 3 dollars
1972-1973: Hey! We have a real budget
now! Let's use it to hire movie stars to
1988-1991: Let's give parody and quality
animation a whirl
We put actual effort into this?
2002-2005: That was haaaaaaaaard.
Let's just bank off the previous movies.