Haha, that XKCD is great. Yeah, this was definitely a recognized constraint for the where section. What I will say is that I recently graduated from college, s

Haha, that XKCD is great. Yeah, this was definitely a recognized constraint for the where section. What I will say is that I recently graduated from college, so my data was actually fairly descriptive - friends' hometowns (where a number of them have moved back) + a whole lot of international students in my college town who got US numbers.