Averaged magnetic field strength against density from runs M01, M04, M08, M12, and M04A in blue, orange, green, red, and purple. The same time step as in Fig. 4 and plotted with line width that decreases with increasing in time. Standard deviations are shown with shades. The relations B ∝ n^2/3 (dashed), B ∝ n⁰ (plain), B ∝ n^1/2 (dotted), and B ∝ n^0.83 (dot-dashed) are plotted for reference.