There seems to be something strange going on with the "Global Average" number.  Even though the USD and CNY (converted to USD) prices are very close and >90% of the volume, the Global Average number is much lower than either of these prices.  That would imply the rest of the world is WAY below this price - which seems to NOT be the case. 

(I have a web page image to insert here but don't know how to do it.)