50 visiting now: 31 USA 
7 Singapore 
4 France 
4 UK 
3 Russia 
2 Pakistan 
2 Belgium 
1 Iran 
1 China 
7 Singapore 4 France 4 UK 3 Russia 2 Pakistan 2 Belgium 1 Iran 1 China 7 Singapore 4 France 4 UK 3 Russia 2 Pakistan 2 Belgium 1 Iran 1 China