Illustration of the old (1) and new (2) binning scheme for the calculation of . In the old binning scheme, was calculated directly from the lens-lens-source triplets inside a given bin. In the new binning scheme, the average of the lens-lens-source triplets in a bin is calculated first. These averages are used as seeds for a Voronoi tessellation of the parameter space. Each Voronoi cell is then considered as a new bin for which is estimated. The aperture statistics are obtained by integrating over the new bins. We show only two dimensions here, but for the measurement the tessellation was also made along the third parameter ϕ.