"Around 82% of S and P 500 companies published corporate sustainability reports in 2016, according to the Governance and Accountability Institute, up from 20% in 2011 and 72% in 2013."

[COMMENTARY] These are great numbers and demonstrate how companies are responding to investor demands for increased ESG reporting. For companies, there’s the additional benefit of measuring themselves on ESG variables, many of which are material to their operations and can help improve their financials.
More Companies Reporting on ESG, by Leila Mead, June 27, 2017, International Institute for Sustainable Development (IISD), USA.