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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 ... | $571,601,468 | $366,600,456 | $242,684,685 | $352,889,286 | $381,726,128 | $337,309,393 | $478,838,165 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $24,152,450 | $63,484,432 | $57,266,885 | $140,835,427 | $10,187,786 | $88,692,811 | $180,738,494 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $43,538,474 | $55,784,999 | $52,046,570 | $108,297,437 | $52,228,635 | $10,116,170 | $25,659,081 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $1,423,900 | $950,303 | $5,210,432 | $5,124,943 | $4,494,907 | $202,199 | $1,553,651 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $22,399,136 | $3,502,882 | $9,401,658 | $9,162,949 | $1,362,863 | $412,126 | $3,227,711 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $3,170,399 | $1,573,199 | $714,200 | $574,583 | $819,011 | $353,631 | $10,037,488 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $9,142,092 | $5,537,701 | $33,601,230 | $209,095,680 | $61,809,583 | $9,493,741 | $10,912,065 |
| Total | $675,427,919 | $497,433,972 | $400,925,660 | $825,980,305 | $512,628,913 | $446,580,071 | $710,966,655 |
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