40 visiting now: 26 USA 
7 Singapore 
3 Belgium 
2 UK 
2 Germany 
1 Poland 
1 Brazil 
1 Canada 
1 China 
1 Japan 
7 Singapore 3 Belgium 2 UK 2 Germany 1 Poland 1 Brazil 1 Canada 1 China 1 Japan 7 Singapore 3 Belgium 2 UK 2 Germany 1 Poland 1 Brazil 1 Canada 1 China 1 Japan