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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | $144 | $85 | $641 | $12,484 | $5,755 | $1,895 |
| Pyridine & its salts | | | | | $351 | | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $340,921 | $451,404 | $332,117 | $91,951 | $214,959 | $397,595 | $396,122 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $34,884 | $31,944 | $318,339 | $1,795,478 | $764,739 | $1,289,549 | $296,824 |
| Melamine | $28 | $110,536 | | $1,718 | | $29,235 | $46,654 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $13,536 | $17,444 | $13,388 | $22,371 | $8,294 | $22,892 | $15,942 |
| 6-Hexanelactam (epsilon-caprolactam) | | | | | $3,597 | | |
| Lactams (excl. of 2933.71 & 2933.72) | | | | $15,568 | $4,115 | $5,414 | $5,033 |
| Total | $389,369 | $611,472 | $663,929 | $1,927,727 | $1,008,539 | $1,750,440 | $762,470 |
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