25 visiting now: 9 USA 
7 Singapore 
6 UK 
2 Brazil 
2 China 
1 Belgium 
1 France 
1 Netherlands 
1 Russia 
7 Singapore 6 UK 2 Brazil 2 China 1 Belgium 1 France 1 Netherlands 1 Russia 7 Singapore 6 UK 2 Brazil 2 China 1 Belgium 1 France 1 Netherlands 1 Russia