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| Commodity | 2005 | 2006 | 2007 | 2008 | 2010 |
| Phenazone (antipyrin) & its derivs. | | | | $445 | $43,417 |
| Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ... | $3,919 | | $768 | | $190 |
| Hydantoin & its derivs. | | | $4,110 | | |
| Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ... | | | | | $667 |
| Pyridine & its salts | | | | | $958 |
| Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ... | $6,554 | $8,775 | $18,853 | $68,957 | $37,989 |
| Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... | $9,687 | $305,705 | $39,255 | $98,312 | $288,874 |
| Melamine | $14,842 | $20,666 | $207,880 | $410,103 | $60,683 |
| Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ... | | $57,114 | $66,804 | $58,068 | $76,151 |
| Lactams (excl. of 2933.71 & 2933.72) | | | $1,325 | $5,782 | $2,532 |
| Total | $35,002 | $392,260 | $338,995 | $641,667 | $511,461 |
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