Homegrown Video is US based and so is 95% of our content. The other 5% is from all over the world. We generally reject stuff from Czech or Russian producers since it tends to lack the spark or "X" factor that our mostly US audience likes most. I personally find that stuff tends to be very flat and lacking in real passion at best, repetitive as a broken record, or at worst like someone is holding a gun at their head off screen.
However, we base content purchasing on it having the lust factor and real passion of real amateurs not where it was shot so I can't say we are 100% but we are talking 30 years of acquiring shot at home porn so the overwhelming majority of stuff is produced in the good ol' US of A.