49 visiting now: 33 USA 
6 Singapore 
5 Canada 
3 Hong Kong 
2 UK 
1 Finland 
1 Switzerland 
1 China 
6 Singapore 5 Canada 3 Hong Kong 2 UK 1 Finland 1 Switzerland 1 China 6 Singapore 5 Canada 3 Hong Kong 2 UK 1 Finland 1 Switzerland 1 China