38 visiting now: 24 USA 
6 Singapore 
4 UK 
3 India 
3 Poland 
2 Belgium 
2 China 
1 Japan 
1 Australia 
1 France 
6 Singapore 4 UK 3 India 3 Poland 2 Belgium 2 China 1 Japan 1 Australia 1 France 6 Singapore 4 UK 3 India 3 Poland 2 Belgium 2 China 1 Japan 1 Australia 1 France