Commodity2005200620072008200920102011
Phenazone (antipyrin) & its derivs.  $6$34,500$12,538  
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...$2,500  $5,404   
Hydantoin & its derivs.   $7,384  $25,958
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...$17,846$37,204$202,757$10,070$29,543 $22,156
Pyridine & its salts$145$6,071$2,304    
Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ...$18,449$207,424$102,787$67,834$30,873$49,124$96,678
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$18,227$8,011$9,431$2,418$443$2,210$22,600
Melamine   $117   
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$7,512 $37,015$35,415$4,294  
Lactams (excl. of 2933.71 & 2933.72) $202   $1,668 
Total$64,679$258,912$354,300$163,142$77,691$53,002$167,392