42 visiting now: 28 USA 
6 Singapore 
3 Belgium 
2 China 
1 Colombia 
1 UK 
1 Czech Republic 
1 France 
1 Germany 
1 Brazil 
1 Tunisia 
6 Singapore 3 Belgium 2 China 1 Colombia 1 UK 1 Czech Republic 1 France 1 Germany 1 Brazil 1 Tunisia