56 visiting now: 30 USA 
7 Canada 
7 Singapore 
4 Brazil 
3 Czech Republic 
2 UK 
2 Russia 
1 Australia 
1 France 
1 Belgium 
1 Germany 
1 Venezuela 
1 Iraq 
1 China 
1 Argentina 
7 Canada 7 Singapore 4 Brazil 3 Czech Republic 2 UK 2 Russia 1 Australia 1 France 1 Belgium 1 Germany 1 Venezuela 1 Iraq 1 China 1 Argentina