$\langle{\it p_{\rm T}}\rangle$ in pp collisions at different center-of-mass energies and midrapidity as a function of the event multiplicity for K$_S^0$ and $Λ$ (top panels), $Ξ$ and $Ω$ (bottom panels). $\sqrt{s} = 5.02$ TeV results are shown as black dots, $\sqrt{s} = 7$ TeV results as green squares and $\sqrt{s} = 13$ TeV results as red diamonds. Statistical uncertainties are reported as error bars, systematic uncertainties as boxes whose width represent the systematic error on the multiplicity determination.