From top to bottom panels, left to right: p-values from Pearson correlation tests for the PR, WTs, pulse FWHM, and, when available, the spectral peak energy E_p. Horizontal bars indicate the p-values associated with each correlation test. Green-shaded regions (corresponding to white bars) denote p-values below 0.01, for which the null hypothesis of no temporal trend is rejected. Orange bars correspond to p-values between 0.01 and 0.05, indicating marginal detections of temporal trends. Red bars indicate p-values greater than 0.05, for which the null hypothesis of no temporal evolution cannot be rejected.