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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $44,225,087 | $47,474,377 | $59,804,599 | $66,896,398 | $41,538,300 | $49,656,195 | $62,295,227 |
| Articulated link chain other than roller chain, of iron/steel | $15,509,403 | $15,394,462 | $20,267,964 | $18,373,062 | $17,864,526 | $17,625,287 | $17,894,708 |
| Parts of articulated link chain of iron/steel | $2,974,141 | $4,185,344 | $4,943,043 | $5,869,577 | $2,175,548 | $2,582,723 | $4,047,334 |
| Skid chain of iron/steel | $1,112,501 | $1,325,887 | $2,210,932 | $2,264,478 | $1,922,364 | $2,878,092 | $6,028,121 |
| Stud-link chain of iron/steel | $2,505,364 | $5,824,941 | $5,511,159 | $1,924,939 | $5,623,034 | $4,318,944 | $4,730,544 |
| Welded link chain of iron/steel | $21,267,092 | $21,361,520 | $20,375,875 | $20,004,523 | $16,655,196 | $17,528,883 | $26,917,002 |
| Chain, of iron/steel, n.e.s. in 73.15 | $11,228,188 | $14,395,669 | $15,910,724 | $20,002,425 | $15,057,824 | $8,832,078 | $17,021,388 |
| Parts of chains (excl. articulated link chain), of iron/steel | $5,777,604 | $7,655,954 | $11,029,145 | $6,656,854 | $5,579,448 | $9,212,473 | $9,771,909 |
| Total | $104,599,380 | $117,618,154 | $140,053,441 | $141,992,256 | $106,416,240 | $112,634,675 | $148,706,233 |
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