The Statistics| storage display is named misleadingly (at least in German) Statistiken|Lager. The numbers displayed there are not the wares and personal, that you have in the storage houses (incl. HQ), but the overall numbers for the entire economy, including wares and persons in the diverse production sites That should be made clearer, if indeed you want to keep that display like it is. "Gesamtbestand" may be suitable for German. May the language specialists decide what to use for their respective languages.
My personal view is, that a display for the "available" wares and personal (storage houses + HQ alone) would be helpful, be it in addition or as a replacement for the current gauge.