|
| Commodity | 2005 | 2006 | 2007 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $9,585 | $20,294 | $2,715,005 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $131,203 | $68,637 | $38,243 |
| Melamine | | $2,668 | |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | | | $94 |
| Total | $140,788 | $91,599 | $2,753,342 |
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