Tanuki, I admit my error.  The National School Lunch Act became law in 1946 and not in 1945 as stated in my comment.  Aside from a slight difference of one year, what does not make sense about my dates?   The dates I cite forty years later are for obesity rates.  Incidentally, the childhood obesity rate was about 4% in 1963 when such statistics were first gathered nationally and has grown more than 400% since then despite billions of dollars being spent on school food and nutrition programs.   That should tell even the dimmest bulb in the chandelier called Congress that throwing more money at the problem will not work.