Commodity200520062007200820092010
Roller chain of iron/steel$67,623$85,807$57,558$41,591$73,382$11,385
Articulated link chain other than roller chain, of iron/steel$279,137$189,459$292,443$455,481$212,804$347,543
Parts of articulated link chain of iron/steel$24,153$38,466$66,546$84,711$157,652$17,033
Skid chain of iron/steel$8,675$5,670$323$350$755 
Stud-link chain of iron/steel$17,813$59,881$15,517$38,451$6,617$32,253
Welded link chain of iron/steel$20,961$15,586$9,395$6,276$1,988$500
Chain, of iron/steel, n.e.s. in 73.15$236,798$130,598$94,146$135,598$136,330$74,417
Parts of chains (excl. articulated link chain), of iron/steel$145,683$134,994$190,929$166,455$18,561$100,293
Total$800,843$660,461$726,857$928,913$608,089$583,424