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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | | $1,181 | | | | $8,927 | |
| Hydantoin & its derivs. | | | | $60 | | | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | | $55,190 | $57,061 | $455,367 | $145 | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $72,829 | | $4,500 | $4,437 | $17,725 | | $49,063 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $25,150 | $1,379 | $72,693 | $7,313 | $487,205 | | $19,980 |
| Melamine | | | | | | $4,979 | |
| Lactams (excl. of 2933.71 & 2933.72) | | | $1,830 | | $272 | | $80,586 |
| Total | $97,979 | $2,560 | $134,213 | $68,871 | $960,569 | $14,051 | $149,629 |
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