The data represent periodic behaviour of the measured and calculated Ar[1s5 ] number density, calculated rates of main gain processes of Ar[1s5 ] and the mean electron energy u_e. Also, rates of main loss processes of Ar[1s5 ] are included. The index i corresponds to the index of the processes in tables 2 and 3 in the manuscript. The data are obtained at p = 300 mbar, U_0 = 1.5 kV and f = 24 kH in the middle of the gap (x = 2.5 mm).