70 visiting now: 39 USA 
8 Singapore 
7 Brazil 
6 China 
5 Canada 
2 UK 
2 Germany 
2 Hong Kong 
2 Czech Republic 
1 Australia 
1 France 
1 Belgium 
1 Iraq 
1 Jordan 
8 Singapore 7 Brazil 6 China 5 Canada 2 UK 2 Germany 2 Hong Kong 2 Czech Republic 1 Australia 1 France 1 Belgium 1 Iraq 1 Jordan