Taking into account our production rate increases, we have reduced energy consumption on a revenue-adjusted basis by 24.8 percent since 2002. From 2002 to 2007, we conducted 43 Lean+ energy events at sites across the United States, identifying potential energy savings of 518,000 MMBtus. We sponsor internal energy awards to document and replicate best practices across the company; from 2002 to 2006, our sites submitted 72 projects that resulted in annual energy consumption reductions of 861,300 MMBtus.
We also diligently implemented energy conservation programs and increased efficiencies by upgrading lighting, energy management control systems and HVAC and other mechanical systems in our buildings and sites. We also improved our wall insulation and increased communications with our employees to raise awareness of behavioral conservation opportunities. Increased conservation and infrastructure investments are anticipated to yield further reductions, in support of our target to increase our energy efficiency by 25 percent in the next five years so that we more than offset the projected increases in our production rates with environmental improvements.