18 visiting now: 9 USA 
2 Russia 
2 Belgium 
1 China 
1 Germany 
1 Brazil 
1 Poland 
1 Chile 
2 Russia 2 Belgium 1 China 1 Germany 1 Brazil 1 Poland 1 Chile 2 Russia 2 Belgium 1 China 1 Germany 1 Brazil 1 Poland 1 Chile