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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 ... | $28,035,992 | $73,515,437 | $185,826,084 | $391,927,499 | $197,732,151 | $156,575,944 | $98,473,398 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $7,534,142 | $11,529,086 | $23,868,815 | $32,695,425 | $49,562,502 | $25,842,502 | $27,325,166 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,437,352 | $2,551,342 | $11,132,845 | $21,488,943 | $13,949,541 | $47,895,901 | $42,057,235 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $1,275,135 | $1,087,600 | $278,391 | $4,067,278 | $184,729 | $5,533 | $2,942,788 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $24,050,417 | $67,087,842 | $97,927,308 | $70,083,030 | $93,883,177 | $89,566,037 | $75,969,182 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $6,199,672 | $11,266,693 | $55,476,885 | $75,042,051 | $65,967,705 | $109,807,547 | $73,471,931 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $1,982,967 | $1,213,090 | $3,341,532 | $5,160,828 | $8,657,251 | $3,547,022 | $3,303,301 |
| Total | $70,515,677 | $168,251,090 | $377,851,860 | $600,465,054 | $429,937,056 | $433,240,486 | $323,543,001 |
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