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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $8,077,371 | $7,982,554 | $7,732,220 | $9,305,124 | $6,262,639 | $8,982,384 | $12,162,254 |
| Articulated link chain other than roller chain, of iron/steel | $2,339,506 | $2,821,514 | $3,782,345 | $4,665,961 | $9,952,330 | $15,602,869 | $18,205,018 |
| Parts of articulated link chain of iron/steel | $548,447 | $1,438,913 | $1,144,465 | $1,436,444 | $966,941 | $1,876,370 | $1,335,483 |
| Skid chain of iron/steel | $667,512 | $1,220,363 | $365,535 | $252,041 | $60,221 | $753 | $67,543 |
| Stud-link chain of iron/steel | $4,146,381 | $7,375,882 | $5,055,929 | $1,145,860 | $3,053,859 | $3,348,975 | $6,963,308 |
| Welded link chain of iron/steel | $26,810 | $31,188 | $8,588 | $1,478 | $108,735 | $84,576 | $165,833 |
| Chain, of iron/steel, n.e.s. in 73.15 | $6,793,132 | $6,485,060 | $2,449,718 | $2,487,843 | $3,167,467 | $8,147,240 | $20,626,124 |
| Parts of chains (excl. articulated link chain), of iron/steel | $720,250 | $453,087 | $929,861 | $1,254,119 | $1,399,877 | $1,425,530 | $1,018,831 |
| Total | $23,319,409 | $27,808,561 | $21,468,661 | $20,548,870 | $24,972,069 | $39,468,697 | $60,544,394 |
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