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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Phenazone (antipyrin) & its derivs. | | | | | | | $10,000 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | $13,625,000 | $690,000 | $577,000 | $1,386,000 | $1,030,000 | $304,000 | |
| Hydantoin & its derivs. | $4,000 | $5,000 | | | | $4,000 | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | $64,233,000 | $47,697,000 | $46,207,000 | $63,206,000 | $63,123,000 | $55,118,000 | $56,837,000 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $6,246,000 | $5,123,000 | $5,971,000 | $9,427,000 | $8,158,000 | $16,980,000 | $27,643,000 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $7,192,000 | $9,412,000 | $6,857,000 | $3,555,000 | $4,313,000 | $3,831,000 | $6,527,000 |
| Melamine | | | | | $356,000 | $79,000 | $14,000 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $3,397,000 | $5,644,000 | $2,620,000 | $3,347,000 | $3,142,000 | $1,347,000 | $332,000 |
| 6-Hexanelactam (epsilon-caprolactam) | | | | | | | $20,000 |
| Lactams (excl. of 2933.71 & 2933.72) | | $1,244,000 | $1,310,000 | | $171,000 | $18,000 | $518,000 |
| Total | $94,697,000 | $69,815,000 | $63,542,000 | $80,921,000 | $80,293,000 | $77,681,000 | $91,901,000 |
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