40 visiting now: 25 USA 
9 Singapore 
2 Canada 
2 UK 
1 Iran 
1 Iraq 
1 Brazil 
1 China 
1 France 
9 Singapore 2 Canada 2 UK 1 Iran 1 Iraq 1 Brazil 1 China 1 France 9 Singapore 2 Canada 2 UK 1 Iran 1 Iraq 1 Brazil 1 China 1 France