18 visiting now: 5 USA 
5 China 
2 Bangladesh 
2 Brazil 
1 Russia 
1 Gabon 
1 Iraq 
1 Argentina 
5 China 2 Bangladesh 2 Brazil 1 Russia 1 Gabon 1 Iraq 1 Argentina 5 China 2 Bangladesh 2 Brazil 1 Russia 1 Gabon 1 Iraq 1 Argentina