In March 2015 the Consultative Group to Assist the Poor (CGAP) published its annual CGAP Funders Survey. “Conducted annually since 2008, the CGAP Funders Survey, conducted in partnership with MIX, is the most comprehensive source of analysis on primary sources of international funding for microfinance and financial inclusion. In 2014, CGAP and MIX analyzed data from 56 international funders, which represent 76 percent of the global estimate. The global estimate is calculated on data from this sample as well as publicly available information from Symbiotics Surveys.”
You may read the brief entitled, “Trends in International Funding for Financial Inclusion” on the CGAP internet site.