It's a beautiful chart eh' vette? I know there's talk of economic slowdown in China, but they'll still be gobbling up gobs and gobs of copper. The shift toward clean energy (electric cars, windmills, etc.) also uses a lot of copper. If I remember correctly, they use about 400lb of copper per electric car!
In any case, I think that graph speaks volumes. Demand will exceed the warehouse levels and I think a substantial increase in the price of copper is inevitable.