44 visiting now: 23 USA 
8 Singapore 
4 Brazil 
3 Canada 
2 Czech Republic 
2 Germany 
2 China 
1 UK 
1 Belgium 
1 Iran 
1 Iraq 
1 Turkey 
8 Singapore 4 Brazil 3 Canada 2 Czech Republic 2 Germany 2 China 1 UK 1 Belgium 1 Iran 1 Iraq 1 Turkey