It decreased at an average annual rate of 2.9% over this period, although there was considerable volatility between years. Multilateral assistance accounted for the largest share, averaging ETB 21.5 billion per year between 2010/11 and 2015/16, bilateral assistance averaged ETB 16.5 billion. External assistance as a percentage of GDP decreased at an annual average rate of 11.4% between 2010/11 and 2015/16, falling to 4.3% of GDP in 2015/16.