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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Phenazone (antipyrin) & its derivs. | $224 | $184 | $73 | $188 | $215 | $200 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | | | | | $3,272 | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | $19,155 | $4,976 | $563,456 | $25,928 | $3,239 | $2,750 |
| Pyridine & its salts | | $1,194 | | | | |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | | | $579 | $11,353 | | $30,254 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | | | | $379 | $23,620 | |
| Melamine | | $907 | | $142 | | $2,881 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | $1,629 | $2,494 | $3,387 | $24,297 | $21,953 | $64,432 |
| Total | $21,008 | $9,755 | $567,495 | $62,287 | $52,299 | $100,517 |
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