|
| Commodity | 2005 | 2006 | 2007 | 2010 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | $246,202 | $2,216 | $58,999 | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | | $89,333 | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | | | | $615,734 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | | | $8,647 | |
| Melamine | $2,119,717 | $15,987,847 | $15,325,023 | $2,042,669 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $68,148 | $250,568 | $113,062 | $1,921,069 |
| 6-Hexanelactam (epsilon-caprolactam) | | | $25,748 | |
| Total | $2,434,067 | $16,240,631 | $15,620,812 | $4,579,472 |
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