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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $19,550,261 | $26,785,338 | $30,303,707 | $41,436,505 | $16,559,995 | $26,653,268 | $26,675,349 |
| Articulated link chain other than roller chain, of iron/steel | $162,983 | $50,864 | $1,020,257 | $125,092 | $221,752 | $349,265 | $836,972 |
| Parts of articulated link chain of iron/steel | $106 | $1,650 | $1,479,711 | $26,032 | $191,989 | $4,920,993 | $2,405,472 |
| Skid chain of iron/steel | | $690 | $2,219,408 | $62,288 | $151,644 | $176,675 | $26,568 |
| Stud-link chain of iron/steel | $5,040 | $2,236 | $1,735 | $98,199 | $482,518 | $144,410 | $5,505 |
| Welded link chain of iron/steel | $67,100 | $37,911 | $191,498 | $112,308 | $449,660 | $129,476 | $25,635 |
| Chain, of iron/steel, n.e.s. in 73.15 | $403,474 | $392,465 | $29,996 | $63,603 | $67,815 | $250,748 | $228,987 |
| Parts of chains (excl. articulated link chain), of iron/steel | $5,725 | $516,867 | $245,524 | $1,176,711 | $2,480,339 | $1,344,733 | $1,897,795 |
| Total | $20,194,689 | $27,788,021 | $35,491,836 | $43,100,738 | $20,605,712 | $33,969,568 | $32,102,283 |
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