Distribution of polarization degree for 56 CPTA pulsars. The panels from left to right show the distribution for linear polarization, circular polarization, and the absolute value of circular polarization, respectively. The top row of panels shows the binned distribution function, while the bottom row is for the cumulative distribution function. Blue, yellow, and red colors denote the distribution for normal pulsars, isolated MSPs, and binary MSPs, respectively. Error bars are for the 68% confidence level computed from $1/\sqrt{N}$, with N being the counts per each bin. The data for normal pulsars (P₀ > 50 ms) is from Wang et al. (2023).