Unless there's been some EU-wide massive secret project to construct underground parkings under most existing buildings that I'm not aware of, then yeah, most. We don't really have US style suburbs, rural areas are a rounding error for this calculation, so that leaves us with urban areas. Garages in apartment buildings are a luxury, only some new developments have underground parking, so most cars stay either on building-adjacent open-air parking zones, or are parked on the street.