|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | $31 | | | | | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | | $118 | | | | | |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | | $119 | | | $440 | | |
| Melamine | | | | | | | $7,312 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $7,340 | $146,441 | $285,021 | $487,160 | $545,078 | $228,646 | $72,300 |
| Lactams (excl. of 2933.71 & 2933.72) | | $107 | | | | $307 | |
| Total | $7,340 | $146,816 | $285,021 | $487,160 | $545,518 | $228,953 | $79,612 |
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