63 visiting now: 38 USA 
8 Singapore 
8 Canada 
7 China 
2 UK 
1 Taiwan 
1 Argentina 
1 Russia 
8 Singapore 8 Canada 7 China 2 UK 1 Taiwan 1 Argentina 1 Russia 8 Singapore 8 Canada 7 China 2 UK 1 Taiwan 1 Argentina 1 Russia