Region's share of purchases of traffic and infrastructure from private companies (%)

Region purchases of traffic and infrastructure, from private companies, as a share of the net cost of traffic and infrastructure (%). Purchase of business is payment for a public task (core business) that has been handed over to someone else to perform. Net cost means gross cost less gross revenue.各区域向私营企业采购交通与基础设施的采购额，占交通与基础设施净成本（net cost）的比例（%）。业务采购指为已委托他人执行的公共任务（核心业务）所支付的款项。净成本指总成本（gross cost）减去总收入（gross revenue）。