|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2011 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | | | | $24 | | |
| Hydantoin & its derivs. | $5,134 | | $6,099 | | | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | $8,554 | $7,675 | $1,037 | $5,300 | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | | | | | $17 | $63 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | | $694 | | $25,298 | $36 | |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | | | | | | $121 |
| 6-Hexanelactam (epsilon-caprolactam) | | | $64,729 | $55,793 | $23,320 | |
| Total | $5,134 | $9,248 | $78,503 | $82,152 | $28,673 | $184 |
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