19 visiting now: 9 USA 
3 China 
2 Belgium 
1 Russia 
1 Germany 
1 Cambodia 
1 Canada 
1 Nigeria 
3 China 2 Belgium 1 Russia 1 Germany 1 Cambodia 1 Canada 1 Nigeria 3 China 2 Belgium 1 Russia 1 Germany 1 Cambodia 1 Canada 1 Nigeria