28 visiting now: 13 USA 
6 China 
4 Singapore 
1 India 
1 Kenya 
1 Costa Rica 
1 Germany 
1 Australia 
6 China 4 Singapore 1 India 1 Kenya 1 Costa Rica 1 Germany 1 Australia 6 China 4 Singapore 1 India 1 Kenya 1 Costa Rica 1 Germany 1 Australia