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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $9,186,218 | $13,893,919 | $22,772,009 | $27,632,985 | $19,342,029 | $30,181,958 | $37,078,116 |
| Articulated link chain other than roller chain, of iron/steel | $2,172,918 | $2,846,317 | $3,689,289 | $4,947,672 | $3,524,342 | $5,720,767 | $6,530,709 |
| Parts of articulated link chain of iron/steel | $1,124,457 | $729,177 | $1,600,524 | $2,453,858 | $2,214,503 | $2,978,048 | $3,226,696 |
| Skid chain of iron/steel | $1,668,818 | $2,586,922 | $4,241,240 | $5,850,563 | $6,220,280 | $6,629,325 | $6,619,701 |
| Stud-link chain of iron/steel | $1,077,089 | $838,629 | $500,863 | $555,972 | $273,416 | $1,059,948 | $877,808 |
| Welded link chain of iron/steel | $6,149,193 | $7,935,553 | $12,242,239 | $18,802,785 | $8,402,200 | $34,021,902 | $21,741,979 |
| Chain, of iron/steel, n.e.s. in 73.15 | $1,976,752 | $2,841,798 | $3,169,822 | $4,554,181 | $2,637,147 | $5,055,162 | $8,791,444 |
| Parts of chains (excl. articulated link chain), of iron/steel | $1,647,561 | $2,360,700 | $3,287,393 | $4,748,441 | $2,446,365 | $3,469,045 | $4,192,809 |
| Total | $25,003,006 | $34,033,015 | $51,503,379 | $69,546,457 | $45,060,282 | $89,116,155 | $89,059,262 |
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