43 visiting now: 30 USA 
4 Poland 
4 Singapore 
2 Russia 
2 Australia 
2 India 
2 Belgium 
1 Canada 
1 China 
1 Germany 
1 Hong Kong 
1 Ukraine 
1 Japan 
4 Poland 4 Singapore 2 Russia 2 Australia 2 India 2 Belgium 1 Canada 1 China 1 Germany 1 Hong Kong 1 Ukraine 1 Japan