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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $17,648 | $90,261,648 | $62,827,328 | $99,930,525 | | $162,599,403 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $5,613 | $22,076,943 | $80,923,836 | $29,081,103 | $168,047,118 | $175,516,486 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $2,179,697 | $17,986,511 | $55,183,638 | | $1,044,889 | $44,079,255 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $73,401,295 | $198,926,346 | $254,407,157 | $181,705,827 | $46,570,901 | $2,873,870 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $1,574,562 | $14,416,890 | $34,740,768 | | | $9,414,678 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $951,899 | $8,005,258 | $4,427,231 | | | $4,951,740 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $13,378,002 | $29,555,813 | $105,676,314 | $46,020,058 | | $22,537,628 |
| Total | $91,508,716 | $381,229,409 | $598,186,272 | $356,737,513 | $215,662,908 | $421,973,060 |
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