Commodity2005200620072008200920102011
Phenazone (antipyrin) & its derivs.$4,526$84,141$65,567$97,511$1,274$138,299$127,085
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...$9,884$1,422$2,254$2$41,730$22,332$42,246
Hydantoin & its derivs. $2,897$2,335 $4,167$10,167$1,487
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...$491,447$555,047$458,428$840,421$691,757$955,890$710,710
Pyridine & its salts $382$136$1,738$1,501$1,344$1,505
Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ...$82,987$41,804$26,357$119,628$144,992$196,643$325,886
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$318,326$371,697$704,128$599,234$572,727$817,225$483,455
Melamine     $4,346$2,438
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$31,232$39,266$109,021$55,972$52,252$83,220$139,617
6-Hexanelactam (epsilon-caprolactam)$243$259 $173  $164
Lactams (excl. of 2933.71 & 2933.72)  $144$12,706$29,374 $25,566
Total$938,645$1,096,915$1,368,370$1,727,385$1,539,774$2,229,466$1,860,159