41 visiting now: 23 USA 
8 Singapore 
4 Canada 
2 Brazil 
2 Belgium 
1 UK 
1 China 
1 Vietnam 
1 Iran 
1 Tunisia 
8 Singapore 4 Canada 2 Brazil 2 Belgium 1 UK 1 China 1 Vietnam 1 Iran 1 Tunisia 8 Singapore 4 Canada 2 Brazil 2 Belgium 1 UK 1 China 1 Vietnam 1 Iran 1 Tunisia