Commodity2005200620072008200920102011
Tetrahydrofuran$7,805$54,476$66,619$69,638$24,819$75,734$58,708
Heterocyclic comps. cont. an unfused furan ring (whether or not hydrogenate ...  $4,842$9,243 $50,604 
Lactones (excl. coumarin, methylcoumarins & ethylcoumarins)$58,653$117,406$10,910$18,972$172,473$10,003$29,137
Total$66,458$171,882$82,371$97,853$197,292$136,341$87,845