The values of $\langle \mathrm{d}N_\mathrm{ch} / \mathrm{d}\eta \rangle$ in $|\eta|< 0.5$ for the INEL, NSD, and INEL>0 event classes as a function of center-of-mass energy. The lines depict a power-law fit for each event class. The gray bands show one standard deviation of the fit where the errors are quite small. The $\langle \mathrm{d}N_\mathrm{ch} / \mathrm{d}\eta \rangle$ value for INEL>0 events in pp collisions at $\sqrt{s}=13.6$ TeV is included (the red star symbol). Note that the newly added data point is not included in the fit.