57 visiting now: 41 USA 
9 Singapore 
8 Canada 
7 Russia 
3 UK 
2 China 
1 Taiwan 
1 New Zealand 
9 Singapore 8 Canada 7 Russia 3 UK 2 China 1 Taiwan 1 New Zealand 9 Singapore 8 Canada 7 Russia 3 UK 2 China 1 Taiwan 1 New Zealand