22 visiting now: 7 USA 
6 Belgium 
2 China 
2 Nigeria 
2 Germany 
1 India 
1 Russia 
1 Ireland 
6 Belgium 2 China 2 Nigeria 2 Germany 1 India 1 Russia 1 Ireland 6 Belgium 2 China 2 Nigeria 2 Germany 1 India 1 Russia 1 Ireland