27 visiting now: 13 China 
4 USA 
3 Singapore 
2 Germany 
1 New Zealand 
1 Russia 
1 Spain 
1 Malawi 
1 Colombia 
4 USA 3 Singapore 2 Germany 1 New Zealand 1 Russia 1 Spain 1 Malawi 1 Colombia 4 USA 3 Singapore 2 Germany 1 New Zealand 1 Russia 1 Spain 1 Malawi 1 Colombia