[rahimnathwani]

You are correct. I was forgetting the fact that homes in the US are produced in the US, but that, on the whole, cars, and especially car parts, are not.

I looked at this data from 2014: http://www.bea.gov/industry/gdpbyind_data.htm

It shows the value added rather than gross GDP. So if I import $7000 of parts from Asia, and use them to make a $12000 car, that would show up as a $5000 value add, representing the work that was done in the US.

From this data it appears that construction is about just under 4%, and motor vehicles are just under 1%. So, 4x, which is not far off the 5x you stated.