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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 ... | $78,567,428 | $127,568,697 | $153,718,525 | $282,109,796 | $149,908,014 | $248,308,968 | $336,684,797 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $78,843,448 | $85,496,552 | $60,529,081 | $157,433,802 | $41,166,008 | $50,594,926 | $43,509,803 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $239,928 | $1,809,861 | $16,262,238 | $12,735,752 | $21,405,273 | $5,267,216 | $109,941,948 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $5,146,149 | $4,473,864 | $3,279,473 | $74,989 | | $76,200 | |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $91,604,177 | $108,528,146 | $231,679,473 | $250,967,145 | $173,281,778 | $213,225,349 | $301,644,304 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $12,975,492 | $16,743,151 | $23,638,320 | $34,999,841 | $9,938,779 | $12,686,193 | $38,075,015 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $19,213,946 | $3,329,070 | $3,460,924 | $4,023,652 | $5,519,704 | $5,032,478 | $10,011,096 |
| Total | $286,590,568 | $347,949,341 | $492,568,034 | $742,344,977 | $401,219,556 | $535,191,330 | $839,866,963 |
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