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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $24,867,031 | $28,277,741 | $29,792,298 | $29,848,829 | $25,083,798 | $33,327,607 | $48,641,610 |
| Articulated link chain other than roller chain, of iron/steel | $16,973,865 | $18,048,350 | $19,160,977 | $24,903,398 | $16,265,607 | $18,746,728 | $20,384,706 |
| Parts of articulated link chain of iron/steel | $782,093 | $995,932 | $2,000,104 | $3,257,188 | $1,515,912 | $2,478,782 | $2,729,018 |
| Skid chain of iron/steel | $665,294 | $380,171 | $319,006 | $433,112 | $503,295 | $808,589 | $1,380,344 |
| Stud-link chain of iron/steel | $713,222 | $742,516 | $91,066 | $1,512,027 | $449,443 | $1,261,761 | $700,613 |
| Welded link chain of iron/steel | $1,852,779 | $2,551,341 | $5,568,850 | $5,555,101 | $6,581,587 | $6,441,064 | $7,193,354 |
| Chain, of iron/steel, n.e.s. in 73.15 | $16,151,632 | $13,898,415 | $15,796,421 | $26,276,259 | $30,136,362 | $27,650,319 | $27,552,865 |
| Parts of chains (excl. articulated link chain), of iron/steel | $1,835,227 | $2,143,161 | $3,175,827 | $10,363,064 | $8,652,957 | $18,521,669 | $19,079,092 |
| Total | $63,841,143 | $67,037,627 | $75,904,549 | $102,148,978 | $89,188,961 | $109,236,519 | $127,661,602 |
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