Our field organization continues to target profitable growth and effectively manage our cost structure. In the fourth quarter, we saw a 20 basis point sequential improvement in our total Collection volumes. Our industrial Collection volumes were positive on a year-over-year basis for the quarter and for the full year. Our cost of operations as a percentage of revenue was flat on a year-over-year basis after adjusting for the impact of higher fuel expense. SG&A expense was 10.6% in the quarter and 10.1% for the full year. Our safety performance continues to improve with a 4.5% favorable reduction in our frequency rate.Some of our operational achievements during 2011 include: we increased the automated portion of our residential fleet by 8%. 59% of our residential fleet is now automated, which exceeded our year-end goal. We continue to invest in our CNG fleet and natural gas infrastructure, with 6% of our fleet now operating on natural gas. In 2012, we expect about 65% of the trucks we purchase to be fueled by CNG.
Republic Services' CEO Discusses Q4 2011 Results - Earnings Call Transcript
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