ADB has issued its Sustainability Report every 2 years since 2007. The Sustainability Report allows stakeholders to assess ADB's operational and organizational sustainability performance and provides them with a single point of reference to understand the organization's commitment to sustainable development. The 2016 Sustainability Report highlights the integration of sustainability into ADB's investments and organizational activities in 2015. A separate detailed Global Reporting Initiative (GRI) index contains the responses of ADB to standard and specific disclosures in the GRI's G4 Sustainability Reporting Guidelines and G4 Financial Services Sector Guidelines.