The World Bank Group Country Opinion Survey Program (COS) is an ongoing effort to systematically gauge and track the perceptions and views of the World Bank Group’s clients and partners across the globe, over time. The survey data provide the institution with more in-depth understanding of the views of stakeholders on issues related to the World Bank's work on the ground (how it operates, its relationships, and its knowledge) and other development related issues. The program is overseen by the department of External and Corporate Relations’ Public Opinion Research Group (PORG). This collection hosts open, accessible survey data from 29 countries collected in FY 2012 (July 2011-June 2012), 41 countries in FY 2013 (July 2012-June 2013), 42 countries in FY 2014 (July 2013-June 2014), 35 countries in FY 2015 (July 2014-June 2015), 45 countries in FY 2016 (July 2015-June 2016), 35 countries in FY 2017 (July 2016-June 2017), and 39 countries in FY 2018 (July 2017-June 2018). In FY 2019, surveys are being conducted in 45 countries. All data will be regularly updated and more countries will be added as data become available.