39 visiting now: 21 USA 
7 Singapore 
5 UK 
4 Belgium 
1 El Salvador 
1 Iraq 
1 Russia 
1 Brazil 
1 China 
7 Singapore 5 UK 4 Belgium 1 El Salvador 1 Iraq 1 Russia 1 Brazil 1 China 7 Singapore 5 UK 4 Belgium 1 El Salvador 1 Iraq 1 Russia 1 Brazil 1 China