73 visiting now: 38 USA 
6 Singapore 
5 Canada 
5 China 
5 Czech Republic 
4 Brazil 
4 UK 
3 Mexico 
2 Germany 
2 Hong Kong 
1 Ecuador 
1 Belgium 
1 Oman 
1 Finland 
1 Romania 
1 Lithuania 
6 Singapore 5 Canada 5 China 5 Czech Republic 4 Brazil 4 UK 3 Mexico 2 Germany 2 Hong Kong 1 Ecuador 1 Belgium 1 Oman 1 Finland 1 Romania 1 Lithuania