As in Fig. 10, but for the Gaussian KDE number density plot of EW V.S. EW. From the top panel to the bottom panel, the DIBs λ5780, λ5797, and λ6614 are compared with each other. For each panel, the red solid line represents a linear fit to the median EW in each ΔEW = 0.05 Å bin. Except for the bottom panel, the bin size of the EW is ΔEW = 0.02 Å. The coefficients of the linear fit and the Pearson correlation coefficient between the EWs are also annotated in each panel.