The LHC began its 2012 run in early April, colliding protons at a world-record centre-of-mass energy of 8 TeV. In just over two months, CMS has recorded more data than in the 2011 run. As of the short technical stop starting June 18, the LHC had delivered 6.65 fb−1 (inverse femtobarns) of collisions to CMS, of which CMS has recorded 6.15 fb−1, at an average efficiency of over 92%.
The efficiency of data collection is an improvement on 2011's value of around 91%, when CMS recorded 5.56 fb−1 of the 6.10 fb−1 delivered.
The higher collision energy — 8 TeV in 2012 compared to 7 TeV in 2011 — also means that CMS has more sensitivity for many processes, including searches for new physics. You can stay up-to-date with the latest values for data recorded by CMS at http://bit.ly/CMSLumi.