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| Commodity | 2005 | 2006 | 2007 |
| Phenazone (antipyrin) & its derivs. | $103 | $2,261 | $2,251 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | $423 | | $231 |
| Hydantoin & its derivs. | $39,853 | $39,850 | $95,315 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | $3,058,901 | $3,337,655 | $3,072,680 |
| Pyridine & its salts | $15,054 | $37,946 | $29,751 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $7,598,243 | $6,548,481 | $7,505,931 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $11,613,679 | $15,487,690 | $16,184,849 |
| Melamine | $74,411 | $86,401 | $101,087 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $831,419 | $1,623,350 | $1,120,871 |
| 6-Hexanelactam (epsilon-caprolactam) | | | $4,594 |
| Lactams (excl. of 2933.71 & 2933.72) | $967,899 | $783,159 | $680,739 |
| Total | $24,199,985 | $27,946,793 | $28,798,299 |
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