20 visiting now: 8 USA 
2 China 
2 Vietnam 
2 Brazil 
1 Russia 
1 Costa Rica 
1 Saudi Arabia 
1 Iraq 
1 Mexico 
1 Mongolia 
1 Paraguay 
2 China 2 Vietnam 2 Brazil 1 Russia 1 Costa Rica 1 Saudi Arabia 1 Iraq 1 Mexico 1 Mongolia 1 Paraguay