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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Phenazone (antipyrin) & its derivs. | | | | | | $1,568 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | | | | | | $2,621 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | $55,853 | $23,038 | $11,795 | $34,481 | $22,580 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $421,980 | $12,150 | $12,538 | | $74,186 | $17,289 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | | | | $21,565 | $11,816 | $13,350 |
| Melamine | | | | | $42,040 | $20,000 |
| Lactams (excl. of 2933.71 & 2933.72) | $417 | $793 | | $27,150 | | |
| Total | $422,397 | $68,796 | $35,576 | $60,510 | $162,523 | $77,408 |
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