28 visiting now: 11 USA 
5 Singapore 
3 Denmark 
2 China 
2 Germany 
2 Russia 
1 Hong Kong 
1 UK 
1 Japan 
5 Singapore 3 Denmark 2 China 2 Germany 2 Russia 1 Hong Kong 1 UK 1 Japan 5 Singapore 3 Denmark 2 China 2 Germany 2 Russia 1 Hong Kong 1 UK 1 Japan