According to Hendrik Koekkoek who works for Distimo, the top ten countries in terms of yearly revenue growth are
The East Asian markets continued to grow at a high pace in the App Store. Emerging app markets including Brazil, Mexico, Russia and Turkey are catching up. All of these four countries showed a higher year-on-year growth in revenue than the U.S. The U.S. itself ranks as the thirteenth fastest growing country at 44%.
The index of daily revenue per month in the Apple App store for iPhone in the above emerging app markets is