43 visiting now: 20 USA 
9 China 
8 Singapore 
3 Canada 
2 UK 
2 Russia 
1 Hong Kong 
1 New Zealand 
1 Australia 
9 China 8 Singapore 3 Canada 2 UK 2 Russia 1 Hong Kong 1 New Zealand 1 Australia 9 China 8 Singapore 3 Canada 2 UK 2 Russia 1 Hong Kong 1 New Zealand 1 Australia