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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Leaf-springs & leaves therefor, of iron/steel | $78,884,965 | $79,120,000 | $90,907,305 | $112,943,369 | $103,807,186 | $142,689,170 | $150,939,439 |
| Helical springs of iron/steel | $138,372,110 | $170,251,090 | $223,845,618 | $239,177,233 | $218,210,759 | $308,958,024 | $325,764,285 |
| Springs & leaves for springs, of iron/steel (excl. of 7320.10 & 7320.20) | $70,132,038 | $72,067,807 | $68,299,782 | $71,128,709 | $62,231,093 | $84,686,077 | $76,614,768 |
| Total | $287,389,113 | $321,438,897 | $383,052,705 | $423,249,311 | $384,249,038 | $536,333,271 | $553,318,492 |
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