41 visiting now: 31 USA 
5 Canada 
2 Singapore 
2 China 
1 Germany 
1 Korea 
1 Taiwan 
1 UK 
5 Canada 2 Singapore 2 China 1 Germany 1 Korea 1 Taiwan 1 UK 5 Canada 2 Singapore 2 China 1 Germany 1 Korea 1 Taiwan 1 UK