Comparison of ${\rm d}\nch$/${\rm d}\eta$ vs. $\eta$ measurements between the various centre-of-mass energies considered in this study: INEL (left), NSD (middle), and INEL$>$0 (right). The lower parts of the figures show the ratios of data at energies indicated to the data at 0.9 TeV, with corresponding colours. Systematic uncertainties are indicated as coloured bands. | ![](https://alice-publications.web.cern.ch/sites/default/files/papers/1885/dndeta-results-energy-evolution-full-23381.png ) |