48 visiting now: 24 USA 
9 Singapore 
6 Canada 
3 China 
2 Belgium 
2 Brazil 
2 UK 
1 Finland 
1 Germany 
1 Hong Kong 
9 Singapore 6 Canada 3 China 2 Belgium 2 Brazil 2 UK 1 Finland 1 Germany 1 Hong Kong 9 Singapore 6 Canada 3 China 2 Belgium 2 Brazil 2 UK 1 Finland 1 Germany 1 Hong Kong