[encoderer]

I'd say that there's a lot more variables that you didn't control.

It seems fair to say that a big contributor to our economic success in the 50's and 60's was due to every other first world nation having been reduced to rubble in the 1940s.

Manufacturing and innovation in Japan and Europe didn't really roar back until the late 60s and 70s.

[yummyfajitas]

That chart looks at all countries in the OECD (not just the US) and also looks at the 60's and 70's (not the 50's).