[salawat]

...what makes you think the sampling process is equipped to detect it? After all, you'd have to get off your ass and go hunt down the actual people in question, and then you might actuallyy get a politically inconvenient picture of the world.

[roguecoder]

Yes, that is how the Current Population Survey works. The US Census Bureau is very good at its job, when it is allowed to do it.

I recommend "Applied Panel Data Analysis for Economic and Social Surveys" by Hans-Jürgen Andreß, Katrin Golsch, Alexander W. Schmidt, if you would like to learn more.