CAUSE OF ACCIDENT ACCIDENTS FROM 1995-2001 PERCENTAGE OF TOTAL ACCIDENTS

Damage by Outside Force 712 49.3
Other 332 23.0
Internal Corrosion 180 12.5
Construction/Material Defect 121 8.4
External Corrosion 90 6.2
Unknown 8 0.6
TOTAL ACCIDENTS 1,443

100.0