40 visiting now: 28 USA 
7 Singapore 
3 UK 
2 Brazil 
2 France 
1 India 
1 Vietnam 
1 Iran 
1 Belgium 
1 Russia 
1 China 
7 Singapore 3 UK 2 Brazil 2 France 1 India 1 Vietnam 1 Iran 1 Belgium 1 Russia 1 China