75 visiting now: 56 Vietnam 
6 USA 
5 Argentina 
2 China 
2 Russia 
1 Laos 
1 Paraguay 
1 Colombia 
1 Singapore 
1 Costa Rica 
1 Indonesia 
6 USA 5 Argentina 2 China 2 Russia 1 Laos 1 Paraguay 1 Colombia 1 Singapore 1 Costa Rica 1 Indonesia