57 visiting now: 19 USA 
9 Singapore 
5 Canada 
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3 India 
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2 UK 
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1 Russia 
1 Germany 
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9 Singapore 5 Canada 4 Vietnam 3 Ukraine 3 Australia 3 India 3 Brazil 2 UK 1 Iraq 1 Algeria 1 Italy 1 China 1 Argentina 1 Poland 1 Egypt 1 Russia 1 Germany 1 Azerbaijan