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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Leaf-springs & leaves therefor, of iron/steel | $152,223,000 | $180,845,000 | $232,639,000 | $248,943,000 | $157,563,000 | $199,782,031 | $237,957,101 |
| Helical springs of iron/steel | $521,049,000 | $599,000,000 | $648,589,000 | $750,232,000 | $583,922,000 | $690,707,314 | $818,139,054 |
| Springs & leaves for springs, of iron/steel (excl. of 7320.10 & 7320.20) | $288,376,000 | $332,765,000 | $345,376,000 | $421,610,000 | $331,637,000 | $425,215,059 | $503,336,671 |
| Total | $961,648,000 | $1,112,610,000 | $1,226,604,000 | $1,420,785,000 | $1,073,122,000 | $1,315,704,404 | $1,559,432,826 |
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