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| Commodity | 2005 | 2007 | 2008 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of non-malleable ... | $46,219,431 | $31,051,701 | $32,622,057 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of iron (excl. n ... | $19,975,342 | $40,253,783 | $46,578,274 |
| Flanges of stainless steel | $8,651,951 | $60,145,993 | $46,008,886 |
| Threaded elbows, bends & sleeves of stainless steel | $3,201,221 | $6,073,630 | $10,202,121 |
| Butt welding fittings of stainless steel | $4,070,402 | $7,689,122 | $16,918,133 |
| Tube/pipe fittings of stainless steel (excl. of 7307.21-7307.23) | $8,739,283 | $27,614,380 | $53,605,833 |
| Flanges of iron/steel (excl. of cast iron/stainless steel) | $20,612,547 | $66,246,811 | $83,310,734 |
| Threaded elbows, bends & sleeves of iron/steel (excl. of cast iron/stainles ... | $3,480,938 | $17,004,217 | $23,092,918 |
| Butt welding fittings of iron/steel (excl. of cast iron/stainless steel) | $8,884,368 | $38,047,120 | $48,761,013 |
| Tube/pipe fittings of iron/steel (excl. cast iron/stainless steel; excl. of ... | $29,487,307 | $47,567,637 | $62,560,098 |
| Total | $153,322,790 | $341,694,394 | $423,660,067 |
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