57 visiting now: 29 USA 
10 China 
8 Singapore 
3 Canada 
3 UK 
2 France 
1 Germany 
1 Australia 
1 Russia 
1 Finland 
10 China 8 Singapore 3 Canada 3 UK 2 France 1 Germany 1 Australia 1 Russia 1 Finland 10 China 8 Singapore 3 Canada 3 UK 2 France 1 Germany 1 Australia 1 Russia 1 Finland