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| Commodity | 2006 | 2007 | 2008 |
| Artificial guts (sausage casings) of hardened protein/of cellulosic mats | $1,034,292 | $1,886 | $44,345 |
| Tubes, pipes & hoses, rigid, of polymers of ethylene | $2,756,254 | $7,371,355 | $8,829,097 |
| Tubes, pipes & hoses, rigid, of polymers of propylene | $1,767,579 | $2,072,011 | $1,841,284 |
| Tubes, pipes & hoses, rigid, of polymers of vinyl chloride | $3,857,100 | $3,474,996 | $4,591,404 |
| Tubes, pipes & hoses, rigid, of plastics n.e.s. in 39.17 | $7,855,970 | $4,951,556 | $5,901,190 |
| Flexible tubes, pipes & hoses of plastics, having a minimum burst pressure ... | $7,336,861 | $6,334,115 | $5,086,221 |
| Tubes, pipes & hoses of plastics (excl. of 3917.31), not reinf./othw. combi ... | $1,696,546 | $2,207,564 | $1,957,656 |
| Tubes, pipes & hoses of plastics (excl. of 3917.31 & 3917.32), not reinf./o ... | $1,260,578 | $6,364,107 | $3,814,268 |
| Tubes, pipes & hoses of plastics, n.e.s. (excl. of 3917.21-3917.33) | $10,742,730 | $16,688,645 | $13,635,467 |
| Fittings (e.g., joints, elbows, flanges) for tubes, pipes & hoses, of plast ... | $13,616,402 | $11,795,297 | $15,876,243 |
| Total | $51,924,312 | $61,261,532 | $61,577,175 |
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