Energy productivity

The indicator results from the division of the gross domestic product (GDP) by the gross available energy for a given calendar year. It measures the productivity of energy consumption and provides a picture of the degree of decoupling of energy use from growth in GDP. For the calculation of energy productivity Eurostat uses the GDP either in the unit of million euro in chain-linked volumes to the reference year 2010 (at 2010 exchange rates) or in the unit million purchasing power standards (PPS). The unit euro in chain linked volumes allows observing the energy productivity trends over time in a single geographic area, whereas the unit PPS allows comparison between countries for the same year. The gross available energy is calculated as: Primary production + Recovered & recycled products + Imports – Exports + Stock changes.该指标为某一公历年度国内生产总值（Gross Domestic Product，GDP）与总可用能源的比值结果，用于衡量能源消费生产率，并展现能源使用与GDP增长之间的脱钩程度。在计算能源生产率时，欧盟统计局（Eurostat）采用两种计价口径的GDP数据：一是以2010年为基准年的连锁价值百万欧元（按2010年汇率折算），二是百万购买力标准（Purchasing Power Standards，PPS）。以连锁价值欧元为计价单位的计量方式，可用于观测单一地理区域内能源生产率随时间的变化趋势；而以PPS为计价单位的计量方式，则支持同一公历年度内不同国家间的横向比较。总可用能源的计算公式为：一次能源生产量+回收再利用产品量+进口量–出口量+库存变动量。