Data from the International Tanker Owners Pollution Federation Limited (www.itopf.com) give the cause of spillage for 455 large oil tanker accidents from 1970 to 2012. Here are the displays. Write a brief report interpreting what the displays show. Is a pie chart an appropriate display for these data? Why or why not?

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160 140 120 100 80 60 40 20 Other/Unknown 41 Collisions Hull Failures 60 134 18 53 Equipment Failure 149 Fires & Explosions Groundings