52 visiting now: 29 USA 
6 India 
5 China 
3 Singapore 
3 Canada 
2 Ukraine 
2 Australia 
2 Vietnam 
2 Russia 
2 UK 
1 Germany 
1 Brazil 
6 India 5 China 3 Singapore 3 Canada 2 Ukraine 2 Australia 2 Vietnam 2 Russia 2 UK 1 Germany 1 Brazil