48 visiting now: 33 USA 
10 Germany 
4 Canada 
3 UK 
1 China 
1 Hong Kong 
1 Saudi Arabia 
1 Australia 
1 Singapore 
10 Germany 4 Canada 3 UK 1 China 1 Hong Kong 1 Saudi Arabia 1 Australia 1 Singapore 10 Germany 4 Canada 3 UK 1 China 1 Hong Kong 1 Saudi Arabia 1 Australia 1 Singapore