53 visiting now: 38 USA 
9 Singapore 
8 Canada 
1 UK 
1 China 
1 New Zealand 
1 Russia 
1 Australia 
9 Singapore 8 Canada 1 UK 1 China 1 New Zealand 1 Russia 1 Australia 9 Singapore 8 Canada 1 UK 1 China 1 New Zealand 1 Russia 1 Australia