56 visiting now: 33 USA 
10 Singapore 
8 Canada 
3 Brazil 
2 Czech Republic 
2 China 
1 Venezuela 
1 Germany 
1 Australia 
1 Iraq 
1 UK 
10 Singapore 8 Canada 3 Brazil 2 Czech Republic 2 China 1 Venezuela 1 Germany 1 Australia 1 Iraq 1 UK