20 visiting now: 8 USA 
4 Belgium 
3 China 
1 Germany 
1 Vietnam 
1 Ecuador 
1 South Africa 
1 Nigeria 
4 Belgium 3 China 1 Germany 1 Vietnam 1 Ecuador 1 South Africa 1 Nigeria 4 Belgium 3 China 1 Germany 1 Vietnam 1 Ecuador 1 South Africa 1 Nigeria