Number of years for which external ESG performance has been reported

This measure calculates number of years ESG results have been reported to an external audience. Environmental Sustainability and Governance (ESG) reporting refers to your main external ESG or sustainability report, most likely an annual publication. If your main external report is issued in multiple documents, consider all of them when answering. If your ESG report is integrated into your full annual report, consider only the ESG elements when answering. This Supplemental Information measure is intended to help companies evaluate additional variables related to the process "Measure and report EHS performance".