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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 ... | $407,221 | $48,227 | $12,926 | $1,108 | $156 | $295,585 | $16,499,926 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,344,414 | $28,014,738 | $327,986 | $1,662 | | $64,124 | $62,773 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $28,646,615 | $4,051,767 | $55,158,339 | $185,807,617 | $251,492,770 | $128,363,194 | $119,731,241 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | | $86,243 | $563 | $45,049 | $224,737 | $32,073 | $3,412,684 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $2,119,417 | $5,512,509 | $1,359,595 | $5,678,131 | $150,505 | $596,370 | $433,970 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $44,598,072 | $45,712,577 | $95,797,358 | $161,719,088 | $119,992,539 | $117,589,183 | $85,875,488 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $19,456,733 | $10,498,141 | $2,926,173 | $5,489,483 | $4,081,601 | $2,746,062 | $4,010,854 |
| Total | $96,572,472 | $93,924,202 | $155,582,940 | $358,742,138 | $375,942,308 | $249,686,591 | $230,026,936 |
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