16 visiting now: 8 China 
3 USA 
2 India 
2 Belgium 
1 Thailand 
1 Congo 
1 Uzbekistan 
1 Poland 
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3 USA 2 India 2 Belgium 1 Thailand 1 Congo 1 Uzbekistan 1 Poland 1 Singapore 3 USA 2 India 2 Belgium 1 Thailand 1 Congo 1 Uzbekistan 1 Poland 1 Singapore