56 visiting now: 34 USA 
9 Singapore 
4 Brazil 
2 Belgium 
2 Russia 
2 China 
1 France 
1 Tunisia 
1 Germany 
1 Iraq 
1 Serbia 
1 Czech Republic 
9 Singapore 4 Brazil 2 Belgium 2 Russia 2 China 1 France 1 Tunisia 1 Germany 1 Iraq 1 Serbia 1 Czech Republic