Kernel density estimates (KDE) for the number of targets (with ) extracted for each campaign, going from C0 in the top panel to C4 in the bottom panel. The KDEs for each panel denote the total number of targets extracted (full black), the main proposed targets (green dash-dot-dot-dot), and the new targets picked up by K2P² (red dash-dot). The integrals of the KDEs are listed in each panel together with the percentage addition of targets by K2P². Note the change in units on the ordinate for the top panels (C0 and C1).