39 visiting now: 26 USA 
8 Singapore 
4 Canada 
2 Brazil 
1 Belgium 
1 UK 
1 China 
1 Iran 
8 Singapore 4 Canada 2 Brazil 1 Belgium 1 UK 1 China 1 Iran 8 Singapore 4 Canada 2 Brazil 1 Belgium 1 UK 1 China 1 Iran