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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Phenazone (antipyrin) & its derivs. | | $44 | | $9,693 | $6,723 | $80,302 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | $1,555 | $64,625 | $16,663 | $13,098 | $9,709 | $12,095 |
| Hydantoin & its derivs. | $12 | $77 | | | $429 | $370 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | $221,659 | $182,480 | $59,320 | $777,844 | $32,382 | $9,075 |
| Pyridine & its salts | $3,080 | $2,475 | $309 | | | $11,333 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $989,960 | $1,672,160 | $711,377 | $107,120 | $26,816 | $46,495 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $60,950 | $213,647 | $44,511 | $154,954 | $1,577 | $24,523 |
| Melamine | $977 | $3,055 | | $14,524 | $8,233 | $3,636 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | | $23,467 | $21,697 | $8,075 | $38,047 | $11,601 |
| 6-Hexanelactam (epsilon-caprolactam) | | $702 | $240 | $98,938 | $474,708 | $174,639 |
| Lactams (excl. of 2933.71 & 2933.72) | | $3,884 | $3,531 | $26 | | |
| Total | $1,278,193 | $2,166,616 | $857,648 | $1,184,272 | $598,624 | $374,069 |
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