Almost 40 years ago, rich country governments agreed to give 0.7% of their GNI (Gross National Income) as official aid to poor countries for development assistance.
The average aid delivered each year has actually been between 0.2 to 0.4%. The shortfall has therefore accumulated to over $4 trillion dollars at 2008 prices, while total aid delivered in that same time frame has reached just under $3 trillion.
This update includes updated charts and graphs that look into this further.
Read full article: Official global foreign aid shortfall: $4 trillion