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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $2,152,805 | $3,036,891 | $3,650,055 | $3,543,297 | $4,961,329 | $8,028,323 | $13,351,934 |
| Articulated link chain other than roller chain, of iron/steel | $4,189,132 | $4,814,688 | $8,043,450 | $9,809,264 | $9,519,304 | $12,977,272 | $19,494,343 |
| Parts of articulated link chain of iron/steel | $2,746,890 | $2,477,531 | $2,693,929 | $6,994,288 | $7,939,218 | $11,560,770 | $9,519,520 |
| Skid chain of iron/steel | $299,671 | $64,072 | $2,601,355 | $126,055 | $133,177 | $184,515 | $441,705 |
| Stud-link chain of iron/steel | $181,284 | $348,495 | $479,571 | $1,024,769 | $618,051 | $719,878 | $1,363,155 |
| Welded link chain of iron/steel | $239,469 | $164,401 | $435,960 | $555,408 | $456,797 | $373,967 | $535,768 |
| Chain, of iron/steel, n.e.s. in 73.15 | $4,854,628 | $3,918,083 | $5,583,463 | $6,722,666 | $9,153,252 | $9,012,459 | $9,778,901 |
| Parts of chains (excl. articulated link chain), of iron/steel | $1,424,615 | $1,640,944 | $2,042,396 | $1,712,280 | $3,902,391 | $4,410,923 | $5,600,342 |
| Total | $16,088,494 | $16,465,105 | $25,530,179 | $30,488,027 | $36,683,519 | $47,268,107 | $60,085,668 |
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