Relative contributions to the total magnetic energy from the different parts of the field strength PDF. While the solid line is the amplitude-normalized contribution function, the dashed line represents its integral from zero up to the given field strength (the cumulative contribution function), normalized to unity amplitude. We notice that the Gaussian PDF core is responsible for approximately 60% of the total energy, while the extended damping wings (due to the flux tubes) contribute the rest. The vertical dotted line marks the RMS () of the field, 161 G.