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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 ... | $6,644,450 | $13,690,959 | $36,031,541 | $42,262,564 | $24,406,202 | $20,345,298 | $44,057,803 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $27,922,221 | $48,181,159 | $87,977,172 | $80,102,805 | $26,565,999 | $34,688,364 | $41,440,797 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,016,405 | $7,466,878 | $12,179,804 | $14,770,271 | $3,001,954 | $2,109,158 | $2,652,226 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $9,162,213 | $8,246,688 | $13,757,324 | $16,001,817 | $3,656,553 | $7,211,273 | $8,259,538 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $5,471,098 | $4,476,675 | $4,082,731 | $13,697,471 | $6,547,091 | $10,325,603 | $5,288,246 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $5,469,790 | $3,405,746 | $6,789,511 | $6,330,164 | $3,464,211 | $3,970,886 | $1,746,151 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $8,801,038 | $8,830,693 | $14,038,685 | $18,261,761 | $2,601,030 | $4,719,788 | $2,247,576 |
| Total | $64,487,215 | $94,298,798 | $174,856,768 | $191,426,853 | $70,243,040 | $83,370,370 | $105,692,337 |
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