52 visiting now: 28 USA 
6 Germany 
5 Belgium 
4 Czech Republic 
3 Canada 
2 France 
2 UK 
2 Hong Kong 
1 Portugal 
1 Saudi Arabia 
1 Brazil 
1 New Zealand 
1 Poland 
6 Germany 5 Belgium 4 Czech Republic 3 Canada 2 France 2 UK 2 Hong Kong 1 Portugal 1 Saudi Arabia 1 Brazil 1 New Zealand 1 Poland