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| Sub-Chapter | 2005 | 2007 | 2008 |
| Sheet piling of iron or steel | $3,290,865 | $25,757,752 | $45,458,993 |
| Railway or tramway track construction material of iron or steel | $2,005,094 | $1,860,628 | $3,350,532 |
| Tubes, pipes and hollow profiles, of cast iron. | $10,601,764 | $4,536,612 | $16,081,662 |
| Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) ... | $33,892,034 | $59,566,431 | $124,884,513 |
| Other tubes and pipes (for example, welded, riveted or similarly closed) | $12,623,228 | $52,450,162 | $24,224,978 |
| Other tubes, pipes and hollow profiles | $31,247,003 | $93,875,238 | $74,887,650 |
| Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or ... | $28,699,463 | $58,927,508 | $50,568,599 |
| Structures (excluding prefabricated buildings of heading 94.06) | $102,893,314 | $146,341,155 | $209,542,563 |
| Reservoirs, tanks, vats and similar containers for any material | $4,330,413 | $17,521,603 | $41,345,057 |
| Tanks, casks, drums, cans, boxes and similar containers, for any material | $5,958,195 | $16,671,991 | $16,063,192 |
| Containers for compressed or liquefied gas, of iron or steel. | $2,738,823 | $3,535,276 | $4,237,437 |
| Stranded wire, ropes, cables, plaited bands, slings and the like, of iron o ... | $2,742,133 | $7,068,630 | $9,103,442 |
| Barbed wire of iron or steel; twisted hoop or single flat wire, barbed or n ... | $791,755 | $690,631 | $476,703 |
| Cloth (including endless bands), grill, netting and fencing, of iron or ste ... | $2,622,717 | $4,097,470 | $2,984,741 |
| Chain and parts thereof, of iron or steel. | $6,098,135 | $5,529,734 | $5,905,091 |
| Anchors, grapnels and parts thereof, of iron or steel. | $534,516 | $955,171 | $648,600 |
| Nails, tacks, drawing pins, corrugated nails, staples | $3,166,723 | $3,959,777 | $30,270,037 |
| Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pin ... | $16,525,803 | $25,351,359 | $20,863,132 |
| Sewing needles, knitting needles, bodkins, crochet hooks, embroidery stilet ... | $778,024 | $737,874 | $865,145 |
| Springs and leaves for springs, of iron or steel. | $1,317,038 | $2,145,288 | $2,477,772 |
| Stoves, ranges, grates, cookers | $25,191,615 | $23,055,094 | $25,024,177 |
| Radiators for central heating, not electrically heated, and parts thereof | $712,476 | $3,995,049 | $3,120,978 |
| Table, kitchen or other household articles and parts thereof, of iron or st ... | $89,741,170 | $140,990,576 | $113,320,118 |
| Sanitary ware and parts thereof, of iron or steel. | $19,538,279 | $32,211,126 | $32,479,556 |
| Other cast articles of iron or steel. | $12,752,160 | $20,287,069 | $21,417,831 |
| Other articles of iron or steel. | $18,299,641 | $50,540,983 | $64,818,889 |
| Total | $439,092,381 | $802,660,187 | $944,421,388 |
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