57 visiting now: 48 USA 
5 Singapore 
2 UK 
2 Hong Kong 
2 Russia 
1 Australia 
1 China 
1 Netherlands 
5 Singapore 2 UK 2 Hong Kong 2 Russia 1 Australia 1 China 1 Netherlands 5 Singapore 2 UK 2 Hong Kong 2 Russia 1 Australia 1 China 1 Netherlands