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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Artificial guts (sausage casings) of hardened protein/of cellulosic mats | $191,879 | $166,450 | $231,420 | $244,445 |
| Tubes, pipes & hoses, rigid, of polymers of ethylene | $149,519 | $255,136 | $464,421 | $302,247 |
| Tubes, pipes & hoses, rigid, of polymers of propylene | $31,444 | $2,854 | $24,366 | $66,319 |
| Tubes, pipes & hoses, rigid, of polymers of vinyl chloride | $43,308 | $5,377 | $19,887 | $535,794 |
| Tubes, pipes & hoses, rigid, of plastics n.e.s. in 39.17 | $338,279 | $460,524 | $820,884 | $490,301 |
| Flexible tubes, pipes & hoses of plastics, having a minimum burst pressure ... | $242,118 | $278,928 | $206,771 | $465,490 |
| Tubes, pipes & hoses of plastics (excl. of 3917.31), not reinf./othw. combi ... | $17,139 | $7,307 | $12,469 | $23,957 |
| Tubes, pipes & hoses of plastics (excl. of 3917.31 & 3917.32), not reinf./o ... | $4,915 | $273 | $92,463 | $26,452 |
| Tubes, pipes & hoses of plastics, n.e.s. (excl. of 3917.21-3917.33) | $147,649 | $405,838 | $431,299 | $1,386,849 |
| Fittings (e.g., joints, elbows, flanges) for tubes, pipes & hoses, of plast ... | $734,297 | $849,556 | $1,253,687 | $1,576,116 |
| Total | $1,900,547 | $2,432,243 | $3,557,667 | $5,117,970 |
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