International merchandise trade by commodity, chained 2017 dollars, monthly

International merchandise trade data grouped by North American Product Classification System (NAPCS) section. Users have the option of selecting Imports and Exports. Data are in constant dollar terms, calculated using a chained Fisher formula with 2017 as the base year, seasonally adjusted, on a Balance of Payments basis, at a monthly frequency.

按北美产品分类体系（North American Product Classification System，NAPCS）章节分组的国际商品贸易数据。用户可选择进口与出口两类数据。该数据以不变价美元计价，采用以2017年为基期的链式费雪公式进行计算，经季节性调整，基于国际收支（Balance of Payments）统计口径，发布频率为月度。