Export volume index (2015 = 100)

Export volume indexes are derived from UNCTAD's volume index series and are the ratio of the export value indexes to the corresponding unit value indexes. Unit value indexes are based on data reported by countries that demonstrate consistency under UNCTAD quality controls, supplemented by UNCTAD's estimates using the previous year's trade values at the Standard International Trade Classification three-digit level as weights.

出口量指数（Export Volume Indexes）源自联合国贸易和发展会议（United Nations Conference on Trade and Development，UNCTAD）的量指数序列，其计算方式为出口价值指数与对应单位价值指数的比值。单位价值指数（Unit Value Indexes）基于通过联合国贸易和发展会议质量管控验证的一致性国家申报数据构建，并辅以联合国贸易和发展会议以标准国际贸易分类（Standard International Trade Classification，SITC）三位层级的上年贸易值作为权重所生成的估算值。