28 visiting now: 17 USA 
8 China 
5 Singapore 
3 Germany 
2 UK 
1 India 
1 Iraq 
1 Bangladesh 
1 Turkey 
8 China 5 Singapore 3 Germany 2 UK 1 India 1 Iraq 1 Bangladesh 1 Turkey 8 China 5 Singapore 3 Germany 2 UK 1 India 1 Iraq 1 Bangladesh 1 Turkey