18 visiting now: 9 USA 
2 Belgium 
2 China 
1 Germany 
1 UK 
1 Denmark 
1 India 
1 Pakistan 
2 Belgium 2 China 1 Germany 1 UK 1 Denmark 1 India 1 Pakistan 2 Belgium 2 China 1 Germany 1 UK 1 Denmark 1 India 1 Pakistan