Statistics of the parallax updates for the CG solutions in Case A0, A1, A2 and B. In each Case the fives curves show, from bottom up, the quantiles q_0.5 (median), q_0.9, q_0.99, q_0.999, and q_0.9999 of the absolute values of the parallax updates in each iteration. The thick vertical lines with arrows indicate the iterations where the solutions had effectively converged according to the truncation errors maps. For better visibility the curves in Case A1, A2 and B have been shifted upwards by 3, 6 and 9 dex, respectively.