25 visiting now: 13 USA 
5 Belgium 
1 China 
1 Singapore 
1 Egypt 
1 India 
1 Vietnam 
1 Chile 
1 Saudi Arabia 
5 Belgium 1 China 1 Singapore 1 Egypt 1 India 1 Vietnam 1 Chile 1 Saudi Arabia 5 Belgium 1 China 1 Singapore 1 Egypt 1 India 1 Vietnam 1 Chile 1 Saudi Arabia