39 visiting now: 26 USA 
7 Singapore 
5 Canada 
2 Belgium 
2 China 
1 France 
1 Germany 
1 Hong Kong 
1 Nigeria 
7 Singapore 5 Canada 2 Belgium 2 China 1 France 1 Germany 1 Hong Kong 1 Nigeria 7 Singapore 5 Canada 2 Belgium 2 China 1 France 1 Germany 1 Hong Kong 1 Nigeria