27 visiting now: 12 USA 
4 China 
3 India 
3 Russia 
1 Germany 
1 Mexico 
1 Denmark 
1 Hong Kong 
1 Singapore 
4 China 3 India 3 Russia 1 Germany 1 Mexico 1 Denmark 1 Hong Kong 1 Singapore 4 China 3 India 3 Russia 1 Germany 1 Mexico 1 Denmark 1 Hong Kong 1 Singapore