Table 1,,,,,,,, U.S. Gas Transmission Pipeline Incidents: 1995–2000,,,,,,,, Cause,1995,1996,1997,1998,1999,2000,Average, ,,,,,,,1995–2000,Percent Construction/material defect,13,8,12,19,8,7,11,15 "Corrosion, external",4,8,5,8,3,14,7,9 "Corrosion, internal",5,7,16,14,10,16,11,15 "Corrosion, not specified",0,0,0,0,1,1,0.3,0.4 Damage by outside force,27,38,28,37,18,20,28,37 Other,15,16,12,21,14,22,17,22 Total,64,77,73,99,54,80,75,99 "SOURCE: U.S. Department of Transportation, Research and Special Programs Administration, Office of Pipeline Safety, from Form RSPA F-7100.2, available at http://ops.dot.gov/stats.htm, as of Oct. 1, 2001. ",,,,,,,, ,,,,,,,,