Swarm parameters are calculated here using BOLSIG+ (ver. 03/2016) solver developed by Gerjan Hagelaar (LAPLACE, France). BOLSIG+ is a program for the numerical solution of the Boltzmann equation for electrons in weakly ionized gases in uniform electric fields, conditions which occur in swarm experiments and in various types of gas discharges and collisional low-temperature plasmas. Please consult BOLSIG+ website for the details and to download the complete freeware application for Windows.