Commodity200520062007200820092010
Tetrahydrofuran$3,788$5,832$1,867$1,173$814 
2-Furaldehyde (furfuraldehyde)  $20$12  
Heterocyclic comps. cont. an unfused furan ring (whether or not hydrogenate ...$253$3,214$14   
Lactones (excl. coumarin, methylcoumarins & ethylcoumarins)$1,497$208$2,087$9,747$65$7,068
Total$5,538$9,254$3,988$10,932$879$7,068