Sure - but as others pointed out there is a pretty good blog post that goes over it: https://18f.gsa.gov/2015/03/19/how-we-built-analytics-usa-go...

And you can see the code and development lifecycle on github: https://github.com/18F/analytics.usa.gov

Pretty lightweight for what it is.

Yes. But it's probably faster and easier to just look online. The data is very likely there.

Only one way to find out.