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The CALiPER 2012 Year in Review report contains several graphs like this one showing overall test results since 2006https://zmi.led-professional.com/Plone/media/resources-1_white-papers_doe-releases-caliper-2012-year-in-review-report_The%20CALiPER%202012%20Year%20in%20Review%20report%20contains%20several%20graphs%20like%20this%20one%20showing%20overall%20test%20results%20since%202006.jpg/viewhttps://zmi.led-professional.com/Plone/media/resources-1_white-papers_doe-releases-caliper-2012-year-in-review-report_The%20CALiPER%202012%20Year%20in%20Review%20report%20contains%20several%20graphs%20like%20this%20one%20showing%20overall%20test%20results%20since%202006.jpg/@@images/image-1200-63f0cbaa0745a591f88785eaf3ed7534.jpeg
The CALiPER 2012 Year in Review report contains several graphs like this one showing overall test results since 2006