In 2010,IFC conducted a study to estimate the number of micro, small, or medium enterprises (MSMEs) in the world,and to determine the degree of access to credit and exercise of deposit accounts for formal and informal MSMEs. The study used primarily data from the World Bank Enterprise Surveys (ES). In 2011 the data was revisited as current enterprise surveys became available. The resulting database, IFC Enterprise Finance Gap Database, and covers 177 countries.
Source: worldbank.org