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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $71,540,053 | $69,298,365 | $71,706,102 | $72,218,119 | $64,453,355 | $85,456,384 | $101,762,318 |
| Articulated link chain other than roller chain, of iron/steel | $36,522,409 | $53,853,478 | $49,764,853 | $58,576,192 | $51,654,554 | $78,117,015 | $106,420,351 |
| Parts of articulated link chain of iron/steel | $8,587,925 | $11,944,239 | $15,875,515 | $21,539,202 | $19,223,974 | $22,730,752 | $21,605,352 |
| Skid chain of iron/steel | $3,657,131 | $5,855,163 | $4,603,959 | $6,426,282 | $4,251,917 | $3,945,746 | $6,881,692 |
| Stud-link chain of iron/steel | $3,507,904 | $3,990,018 | $4,869,600 | $5,177,034 | $6,040,417 | $3,616,683 | $19,138,830 |
| Welded link chain of iron/steel | $22,724,079 | $22,700,102 | $28,682,752 | $30,428,286 | $22,221,240 | $29,422,285 | $31,922,943 |
| Chain, of iron/steel, n.e.s. in 73.15 | $10,765,280 | $11,804,051 | $12,071,048 | $21,314,989 | $12,704,345 | $14,180,341 | $15,651,886 |
| Parts of chains (excl. articulated link chain), of iron/steel | $6,316,765 | $9,394,876 | $12,431,234 | $15,864,146 | $20,824,727 | $23,775,311 | $31,965,213 |
| Total | $163,621,546 | $188,840,292 | $200,005,063 | $231,544,250 | $201,374,529 | $261,244,517 | $335,348,585 |
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