Commodity2005200620072008200920102011
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...    $11,269  
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...$6,748$1,600$4,063$5,980,415$3,739,215$46,578$550,990
Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... $3,229$580$4,730$85,113 $7,192
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$386,630$4,426$36,061 $44,294  
Melamine      $16,323
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$26,929$107,481$14,679$88,759$26,659$24,062$36,145
6-Hexanelactam (epsilon-caprolactam)   $7,805   
Lactams (excl. of 2933.71 & 2933.72)$18,936$2,155$1,960  $11,056$2,045
Total$439,243$118,891$57,343$6,081,709$3,906,550$81,696$612,695