$\Dzero$ meson relative yields at $|y|< 0.5$ for two $\pt$ intervals as a function of the relative charged-particle multiplicity, $N_{\rm V0}$, measured at $-3.7 < \eta < -1.7$ and $2.8 < \eta < 5.1$ The relative yields are presented on the top panels with their statistical (vertical bars) and systematic (boxes) uncertainties, except the uncertainty on the feed-down fraction which is drawn separately in the bottom panels The position of the points on the abscissa is at the average value of $N_{\rm V0} \big/ \langle N_{\rm V0} \rangle$,shifted by 1.5% to improve the visibility The diagonal (dashed) line is also shown to guide the eye
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