28 visiting now: 13 USA 
7 Singapore 
3 Brazil 
2 Vietnam 
2 Russia 
2 France 
1 Romania 
1 China 
1 El Salvador 
1 UK 
1 Germany 
1 Belgium 
7 Singapore 3 Brazil 2 Vietnam 2 Russia 2 France 1 Romania 1 China 1 El Salvador 1 UK 1 Germany 1 Belgium