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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 ... | $6,830,161 | $12,745,058 | $2,974,496 | $11,228,588 | $5,758,355 | $39,808,966 | $111,431,936 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $4,427,742 | $23,507,367 | $5,089,636 | $1,384,457 | $972,778 | $2,609,725 | $5,861,886 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $23,267,224 | $25,061,182 | $17,364,981 | $72,976,489 | $47,509,126 | $14,463,970 | $8,926,503 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $2,772,950 | $1,196,572 | $2,229,735 | $9,260,060 | $6,707,659 | $4,287,450 | $3,914,973 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $9,222,786 | $2,814,842 | $2,497,000 | $7,637,646 | $7,845,515 | $4,174,970 | $6,507,954 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $231,254 | $374,088 | $265,355 | $1,825,299 | $2,804,867 | $458,072 | $1,241,654 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $395,360 | $733,067 | $2,870,778 | $14,766,529 | $3,169,232 | $2,319,691 | $4,819,424 |
| Total | $47,147,477 | $66,432,176 | $33,291,981 | $119,079,068 | $74,767,532 | $68,122,844 | $142,704,330 |
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