55 visiting now: 24 USA 
9 Singapore 
4 India 
3 Iraq 
2 UK 
2 France 
2 Vietnam 
2 Brazil 
1 Pakistan 
1 China 
1 Russia 
1 Saudi Arabia 
1 Gabon 
1 Bangladesh 
1 South Africa 
1 Spain 
9 Singapore 4 India 3 Iraq 2 UK 2 France 2 Vietnam 2 Brazil 1 Pakistan 1 China 1 Russia 1 Saudi Arabia 1 Gabon 1 Bangladesh 1 South Africa 1 Spain