Commodity200520062007200820092010
Phenazone (antipyrin) & its derivs.$4,085$48,650$172,017$21  
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...$8,718$42,167$158,283$19,639 $19,337
Hydantoin & its derivs.$1,905$6,021$16,256$62,621$137,828$110,405
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...$692,405$619,871$882,238$835,886$776,533$1,326,138
Pyridine & its salts$102,417$63,188$173,872$179,055$126,912$330,197
Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ...$82,729$166,457$426,105$370,514$509,013$384,379
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$637,921$1,097,351$1,350,901$1,147,904$1,287,060$2,572,223
Melamine $3,120$896$61,947$37,475$108,174
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$525,661$466,776$568,383$457,235$516,377$583,047
6-Hexanelactam (epsilon-caprolactam) $430$280$7,444$7,438$14,469
Lactams (excl. of 2933.71 & 2933.72)$4,865$11,153$1,521$8,170$3,469$5,442
Total$2,060,706$2,525,184$3,750,752$3,150,436$3,402,105$5,453,811