Histograms of the relative change during the flares (η, in percent of the pre-flare values) of the relative helicity (top) and of the current-carrying helicity (bottom) that are contained in the region outside of the PIL. CME-associated flares are depicted in red, and confined flares are shown in blue. The vertical dotted lines represent the mean values of the respective distributions, and the dashed lines show the median values.