18 visiting now: 7 USA 
5 Canada 
4 UK 
2 Germany 
1 China 
1 Korea 
1 Poland 
1 Singapore 
5 Canada 4 UK 2 Germany 1 China 1 Korea 1 Poland 1 Singapore 5 Canada 4 UK 2 Germany 1 China 1 Korea 1 Poland 1 Singapore