60 visiting now: 33 USA 
7 Singapore 
6 Brazil 
5 Canada 
3 China 
2 Czech Republic 
2 Australia 
2 UK 
2 Russia 
1 Germany 
1 Belgium 
1 Ukraine 
1 Hong Kong 
1 Venezuela 
1 Saudi Arabia 
7 Singapore 6 Brazil 5 Canada 3 China 2 Czech Republic 2 Australia 2 UK 2 Russia 1 Germany 1 Belgium 1 Ukraine 1 Hong Kong 1 Venezuela 1 Saudi Arabia