Each year, the Commission presents a report on the distribution of direct aids to agricultural producers (links are provided on this web page). In this report, the Commission presents the breakdown of direct payments by Member State and size-class of aid. It is the source for the graphs which compare the cumulative amounts of payments with the cumulative number of beneficiaries.
The graph from the most recent report for the 2014 financial year (thus covering direct payments made to farmers in 2013 as Member States are reimbursed in the following financial year) is shown below. It confirms that the oft-quoted statistic that 80% of direct payments go to just 20% of farmer beneficiaries is alive and well; indeed, the distribution is even more skewed in Bulgaria and Romania than in other Member States.