51 visiting now: 31 USA 
6 Singapore 
5 France 
3 UK 
3 Brazil 
2 China 
1 Germany 
1 Saudi Arabia 
6 Singapore 5 France 3 UK 3 Brazil 2 China 1 Germany 1 Saudi Arabia 6 Singapore 5 France 3 UK 3 Brazil 2 China 1 Germany 1 Saudi Arabia