|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | $88 | $4,841 | $228 | $12,618 | | | |
| Hydantoin & its derivs. | | $781 | | | $876 | | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | | | $3,936 | | | |
| Pyridine & its salts | | | | | | $8 | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | | | $2,841 | | | | $97 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $7,738 | $12,894 | | $972 | $2,176 | | $4,550 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $665 | $223 | $25 | | | | $9,954 |
| 6-Hexanelactam (epsilon-caprolactam) | | | $46,643 | | | | $168 |
| Total | $8,491 | $18,739 | $49,737 | $17,526 | $3,052 | $8 | $14,769 |
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