Philadelphia, Pa here. Living just outside of the city to be technical...
Because I was both very interested in knowing the breakdown of where the contributors to the AP forum are coming from and because I'm an uber nerd, I decided track each response the best I could. I've estimated the following...
USA/Canada - 41.4%
Europe - 33.5%
UK/Ireland - 9.5%
Russia - 3.6%
OTHER - 12.1%
For those who claimed to be born/raised in one particular country but are currently residing in another I gave a half credit to the country of origin and a half credit to the country of residence. I really wish I had broken things out by more individual countries. When I first started tracking responses I didn't realize so many of us were from Germany, Netherlands, Canada (separately), etc. But at least this gives a rough estimate for those, probably very few, who are interested!