38 visiting now: 15 USA 
9 Singapore 
6 UK 
6 Brazil 
4 Belgium 
3 China 
1 Australia 
1 Poland 
1 Russia 
9 Singapore 6 UK 6 Brazil 4 Belgium 3 China 1 Australia 1 Poland 1 Russia 9 Singapore 6 UK 6 Brazil 4 Belgium 3 China 1 Australia 1 Poland 1 Russia