38 visiting now: 20 USA 
6 Singapore 
5 Belgium 
3 UK 
2 Russia 
1 Japan 
1 Canada 
1 Korea 
1 China 
1 France 
1 Germany 
1 Iran 
6 Singapore 5 Belgium 3 UK 2 Russia 1 Japan 1 Canada 1 Korea 1 China 1 France 1 Germany 1 Iran