45 visiting now: 41 USA 
6 China 
4 India 
2 Germany 
1 Singapore 
1 Brazil 
1 Turkey 
1 New Zealand 
6 China 4 India 2 Germany 1 Singapore 1 Brazil 1 Turkey 1 New Zealand 6 China 4 India 2 Germany 1 Singapore 1 Brazil 1 Turkey 1 New Zealand