“…In order to quantify this, we searched the literature for the known magnetic hot stars. The major studies consulted were the following: the studies of Ap, He-weak, and He-strong stars by Borra & Landstreet (1979, 1980; Borra et al (1983) and Bohlender et al (1987Bohlender et al ( , 1993; the slowly rotating Ap star study of Landstreet & Mathys (2000); the study of Ap stars by Aurière et al (2007); the sample of Ap stars in open clusters presented by Landstreet et al (2007Landstreet et al ( , 2008; the Herbig Ae/Be stars studied by Alecian et al (2013); the Of?p stars examined by Petit et al (2013) and Munoz et al (2020); the early B-type stars presented by Shultz et al (2018Shultz et al ( , 2019bShultz et al ( , 2020; the volume-limited sample of Ap stars conducted by Sikora et al (2019b,a); the samples of stars with magnetically split lines examined by Mathys (2017) and Chojnowski et al (2019); and the results of the ongoing survey at the Special Astrophysical Observatory of both field stars (Kudryavtsev et al 2006;Romanyuk et al 2014Romanyuk et al , 2015Romanyuk et al , 2016aRomanyuk et al , 2017aRomanyuk et al , 2018Romanyuk 2019;Romanyuk et al 2020) and stars in the Orion nebula (Romanyuk et al 2016b(Romanyuk et al , 2017b(Romanyuk et al , 2019(Romanyuk et al , 2021. The compilation of longitudinal magnetic field curves provided by Bychkov et al (2020) was also consulted, in order to include magnetic stars reported in single-star papers.…”