27 visiting now: 13 USA 
8 China 
1 Japan 
1 Vietnam 
1 Belgium 
1 Nigeria 
1 Germany 
1 Uruguay 
8 China 1 Japan 1 Vietnam 1 Belgium 1 Nigeria 1 Germany 1 Uruguay 8 China 1 Japan 1 Vietnam 1 Belgium 1 Nigeria 1 Germany 1 Uruguay