Commodity2005200620072008200920102011
Phenazone (antipyrin) & its derivs.$15,700$59,441$39,235$89,353$13,202$2,896$377
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...$2,096$5$9,016$5,935$8,190$10,975 
Hydantoin & its derivs.$29,310$15,570$7,473$3,075$6,051$226,943$85,109
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...$836,601$589,721$786,338$1,719,603$2,284,441$1,090,601$257,932
Pyridine & its salts$688$5,492$1,980$11,184$2,229$108$514
Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ...$8,593,733$9,835,505$12,691,080$10,119,334$13,021,468$16,725,279$13,820,980
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$441,242$497,846$400,325$215,387$685,126$51,604$190,703
Melamine$4,634    $2,018$1,140
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$252,783$48,321$89,949$739,972$1,307,527$471,069$758,077
6-Hexanelactam (epsilon-caprolactam)    $3  
Lactams (excl. of 2933.71 & 2933.72)$46,849$2,968$14,531$26,254$52,465$2,431$21,854
Total$10,223,636$11,054,869$14,039,927$12,930,097$17,380,702$18,583,924$15,136,686