68 visiting now: 38 USA 
10 Singapore 
6 UK 
5 France 
2 Saudi Arabia 
2 China 
2 Poland 
1 Finland 
1 Brazil 
1 Switzerland 
1 Germany 
1 Canada 
1 Iran 
1 Colombia 
10 Singapore 6 UK 5 France 2 Saudi Arabia 2 China 2 Poland 1 Finland 1 Brazil 1 Switzerland 1 Germany 1 Canada 1 Iran 1 Colombia