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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Phenazone (antipyrin) & its derivs. | $48,316 | $324 | $6,984 | $5,430 | $302,629 | $72,476 | $11,403 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | | | | | $3,594 | | $23 |
| Hydantoin & its derivs. | | | $85 | $103 | $63 | $143 | $76 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | $60,238 | $13,203 | $134,469 | $70,974 | $68,339 | $33,013 | $67,392 |
| Pyridine & its salts | | $21 | | | | | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $96,140 | $67,183 | $284,658 | $694,482 | $334,212 | $232,484 | $561,812 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $9,025 | $8,502 | $166,441 | $12,535 | $3,280 | $50,853 | $322,175 |
| Melamine | | | $7,326 | $150 | $422 | $496 | $70 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $171 | $566 | | | $643 | $1,536 | $4,082 |
| Lactams (excl. of 2933.71 & 2933.72) | | | | | | $1,788 | |
| Total | $213,890 | $89,799 | $599,963 | $783,674 | $713,182 | $392,789 | $967,033 |
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