56 visiting now: 35 USA 
9 Singapore 
8 Russia 
6 Canada 
5 UK 
3 China 
2 Australia 
1 Finland 
1 Germany 
1 Brazil 
9 Singapore 8 Russia 6 Canada 5 UK 3 China 2 Australia 1 Finland 1 Germany 1 Brazil 9 Singapore 8 Russia 6 Canada 5 UK 3 China 2 Australia 1 Finland 1 Germany 1 Brazil