21 visiting now: 8 USA 
3 China 
2 Brazil 
1 Canada 
1 Ukraine 
1 Hong Kong 
1 Argentina 
1 India 
1 Australia 
1 Jordan 
1 Switzerland 
3 China 2 Brazil 1 Canada 1 Ukraine 1 Hong Kong 1 Argentina 1 India 1 Australia 1 Jordan 1 Switzerland