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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $14,130,032 | $16,147,842 | $24,084,775 | $43,527,556 | $47,575,785 | $61,934,961 | $68,941,441 |
| Articulated link chain other than roller chain, of iron/steel | $9,046,198 | $14,303,724 | $24,490,055 | $30,672,524 | $27,153,011 | $56,265,003 | $60,396,588 |
| Parts of articulated link chain of iron/steel | $1,114,967 | $1,587,406 | $1,185,421 | $2,890,586 | $56,796,665 | $56,440,282 | $58,683,211 |
| Skid chain of iron/steel | $278,594 | $370,586 | $704,387 | $939,257 | $285,101 | $295,947 | $333,321 |
| Stud-link chain of iron/steel | $4,094,235 | $6,988,070 | $10,104,900 | $16,057,877 | $15,594,337 | $15,095,434 | $14,083,177 |
| Welded link chain of iron/steel | $8,266,250 | $9,763,159 | $10,469,102 | $24,796,449 | $14,574,871 | $22,859,962 | $37,041,614 |
| Chain, of iron/steel, n.e.s. in 73.15 | $23,870,558 | $26,552,861 | $29,957,677 | $30,659,546 | $39,433,003 | $27,338,635 | $32,783,531 |
| Parts of chains (excl. articulated link chain), of iron/steel | $3,834,388 | $6,305,363 | $9,128,118 | $12,875,976 | $10,103,471 | $10,736,227 | $18,374,138 |
| Total | $64,635,222 | $82,019,011 | $110,124,435 | $162,419,771 | $211,516,244 | $250,966,451 | $290,637,021 |
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