66 visiting now: 54 USA 
8 Singapore 
4 Canada 
2 Russia 
2 China 
2 UK 
1 Germany 
1 Ireland 
1 Japan 
1 Argentina 
8 Singapore 4 Canada 2 Russia 2 China 2 UK 1 Germany 1 Ireland 1 Japan 1 Argentina 8 Singapore 4 Canada 2 Russia 2 China 2 UK 1 Germany 1 Ireland 1 Japan 1 Argentina