48 visiting now: 34 USA 
6 China 
4 Germany 
2 Canada 
2 UK 
2 India 
2 Australia 
1 Singapore 
1 Ukraine 
1 Russia 
6 China 4 Germany 2 Canada 2 UK 2 India 2 Australia 1 Singapore 1 Ukraine 1 Russia 6 China 4 Germany 2 Canada 2 UK 2 India 2 Australia 1 Singapore 1 Ukraine 1 Russia