19 visiting now: 5 USA 
5 Vietnam 
2 Russia 
2 Brazil 
1 Israel 
1 China 
1 Colombia 
1 Belgium 
1 Germany 
5 Vietnam 2 Russia 2 Brazil 1 Israel 1 China 1 Colombia 1 Belgium 1 Germany 5 Vietnam 2 Russia 2 Brazil 1 Israel 1 China 1 Colombia 1 Belgium 1 Germany