189 visiting now: 172 USA 
8 Singapore 
4 Hong Kong 
3 Belgium 
2 Russia 
2 UK 
2 China 
1 Argentina 
1 Germany 
8 Singapore 4 Hong Kong 3 Belgium 2 Russia 2 UK 2 China 1 Argentina 1 Germany 8 Singapore 4 Hong Kong 3 Belgium 2 Russia 2 UK 2 China 1 Argentina 1 Germany