Leniency programmes have produced a consistent stream of good applications; on average four per month, including immunity applications.
The figure will likely go up when the private-enforcement Directive takes effect because of the limits it puts on joint liability.
… the new rules will preserve leniency programmes. While they will make more evidence available to victims, they also make clear that crucial documents for public enforcement voluntarily submitted by the parties can never be disclosed – namely, leniency corporate statements and settlement submissions.
Joaquín Almunia, Fighting against cartels: A priority for the present and for the future, 3. April 2014.