Historical series of the circulating fleet by Euro category

The data are extracted from the car tax database of the Piedmont Region, where all vehicles owned by residents in Piedmont are censused. The circulating fleet is identified as the set of vehicles owned by residents in the Piedmont Region that are not removed and valid on 31 December of each annual survey carried out. The list shows the number of cars/motor vehicles in circulation, distributed by EURO category. The historical depth is 10 years (from the year indicated).本数据集提取自皮埃蒙特大区（Piedmont Region）的车辆税数据库，该数据库对皮埃蒙特大区居民拥有的全部机动车进行了全面普查。本次统计的在册流通机动车队，被定义为在每年度调查的12月31日当日仍处于未注销状态且合法有效的皮埃蒙特大区居民所有机动车集合。该列表展示了按欧排放标准类别（EURO category）划分的在册机动车数量。本数据集的历史回溯时长为10年（以标注年份起算）。