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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $13,194,501 | $12,252,686 | $16,093,807 | $16,484,969 | $12,089,730 | $12,930,929 | $16,737,371 |
| Articulated link chain other than roller chain, of iron/steel | $3,688,232 | $5,313,396 | $7,222,854 | $8,167,677 | $4,874,167 | $5,767,976 | $7,741,337 |
| Parts of articulated link chain of iron/steel | $1,408,255 | $5,382,247 | $10,652,041 | $15,070,404 | $3,689,638 | $1,317,017 | $1,591,450 |
| Skid chain of iron/steel | $3,004,379 | $4,617,779 | $5,388,024 | $4,305,934 | $3,055,391 | $4,422,639 | $3,821,312 |
| Stud-link chain of iron/steel | $765,634 | $1,203,537 | $1,303,235 | $744,042 | $546,252 | $270,486 | $1,293,151 |
| Welded link chain of iron/steel | $5,604,372 | $7,227,125 | $12,297,775 | $17,127,220 | $8,647,095 | $9,271,818 | $11,555,576 |
| Chain, of iron/steel, n.e.s. in 73.15 | $5,405,721 | $5,253,167 | $6,976,791 | $7,333,528 | $5,607,511 | $6,908,996 | $12,839,381 |
| Parts of chains (excl. articulated link chain), of iron/steel | $1,230,807 | $1,649,577 | $2,629,884 | $2,966,583 | $1,999,646 | $1,725,400 | $2,733,758 |
| Total | $34,301,901 | $42,899,514 | $62,564,411 | $72,200,357 | $40,509,430 | $42,615,261 | $58,313,336 |
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