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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $269,167,916 | $589,438,589 | $1,216,377,126 | $1,291,151,336 | $1,080,937,436 | $420,227,696 | $254,773,490 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $96,491,652 | $121,553,698 | $221,362,678 | $278,397,007 | $123,560,479 | $99,602,781 | $279,018,394 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $203,695,830 | $204,822,008 | $1,008,555,632 | $1,041,231,618 | $414,711,838 | $567,719,858 | $241,598,616 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $13,437,644 | $6,094,438 | $7,976,207 | $21,276,588 | $14,160,663 | $4,407,642 | $14,449,120 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $24,998,763 | $28,042,480 | $44,413,450 | $23,082,489 | $23,019,217 | $17,820,591 | $23,389,312 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $21,343,466 | $33,288,402 | $29,883,127 | $19,327,871 | $20,453,651 | $16,015,008 | $14,018,454 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $558,659 | $1,802,286 | $1,800,556 | $922,407 | $11,688,061 | $923,941 | $1,829,215 |
| Total | $629,693,930 | $985,041,901 | $2,530,368,776 | $2,675,389,316 | $1,688,531,345 | $1,126,717,517 | $829,076,601 |
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