Top panel: spearman rank coefficient of the high-latitude lines of sight as a function of the truncated samples is shown with the solid black curve. Distances correspond to the minimum distance of each truncated sample in which we compute the correlation coefficient. The red shaded regions correspond to the 1 and 2σ deviations, respectively. The blue shaded regions correspond to 1 and 2σ deviations of the uncorrelated case, respectively. Bottom panel: same for the intermediate-latitude sample.