I think you might be confusing GDP with something else. Apollo spending peaked in 1966 at just shy of $3 billion [1] while US GDP was 815 billion [2] for about

I think you might be confusing GDP with something else. Apollo spending peaked in 1966 at just shy of $3 billion [1] while US GDP was 815 billion [2] for about 0.3% percent of the GDP. On the other hand, [3] shows US federal outlays at $17.2 billion, so Apollo would have been 17% of the total budget. [1] https://en.wikipedia.org/wiki/Apollo_program#Costs https://en.wikipedia.org/wiki/Apollo_program#Costs [2] https://www.google.com/search?q=gdp+of+us https://www.google.com/search?q=gdp+of+us [3] https://www.whitehouse.gov/omb/budget/Historicals https://www.whitehouse.gov/omb/budget/Historicals