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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | $13,613 | | $12,960 | | $3,498,171 | $6,842,392 | $10,447,806 |
| Pyridine & its salts | | | | | | $2,655,327 | $8,130,451 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $272,128 | $157,944 | $214,790 | $120,447 | $62,691 | $472,490 | $5,822,287 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $689,514 | $585,881 | $2,211,039 | $102,022 | $1,146,169 | $2,444,965 | $5,515,428 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | | | | | $168,755 | | $891,279 |
| Lactams (excl. of 2933.71 & 2933.72) | | | | | | $1,450,839 | $2,036,049 |
| Total | $975,255 | $743,825 | $2,438,789 | $222,469 | $4,875,786 | $13,866,013 | $32,843,300 |
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