28 visiting now: 15 USA 
4 UK 
2 India 
1 Brazil 
1 China 
1 Italy 
1 Germany 
1 Netherlands 
1 France 
1 Portugal 
4 UK 2 India 1 Brazil 1 China 1 Italy 1 Germany 1 Netherlands 1 France 1 Portugal 4 UK 2 India 1 Brazil 1 China 1 Italy 1 Germany 1 Netherlands 1 France 1 Portugal