General figures don't help much. Global production is helpful but tea is not always traded on 'open' exchanges. Pakistan always threatens to buy their tea elsewhere when Kenya does not buy their rice. Likewise,some types are preferred since they have a name. Darjeeling of India has done well to create a brand.
*** I will have to see if CBS can help.
Greedy when others are fearful,Very fearful when others are greedy - to paraphrase WB
Greedy when others are fearful. Very fearful when others are greedy - to paraphrase Warren Buffett