64 visiting now: 24 USA 
18 China 
8 Netherlands 
3 Russia 
3 India 
2 Brazil 
2 UK 
1 Singapore 
1 Egypt 
1 Pakistan 
1 France 
18 China 8 Netherlands 3 Russia 3 India 2 Brazil 2 UK 1 Singapore 1 Egypt 1 Pakistan 1 France