73 visiting now: 39 USA 
9 Singapore 
6 Australia 
4 India 
4 Belgium 
3 Canada 
3 China 
2 UK 
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1 Russia 
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1 Germany 
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9 Singapore 6 Australia 4 India 4 Belgium 3 Canada 3 China 2 UK 2 Ukraine 1 Russia 1 Finland 1 Germany 1 Ireland 1 New Zealand