数据来源：世界银行官网

世界银行把世界各经济体分成四组，即低收入、中等偏下收入、中等偏上收入和高收入。通常，中、低收入国家被称为发展中国家，高收入国家被称为发达国家。



Historical classification by income：
[color=rgba(0, 0, 0, 0.87)]This file presents the historical income groupings: low, lower-middle, upper-middle, and high, as well as thresholds of the operational lending categories; IDA, IBRD, and Blend.
[color=rgba(0, 0, 0, 0.87)]

Current classification by income：
[color=rgba(0, 0, 0, 0.87)]This file includes the current income groupings: low, lower-middle, upper-middle, and high, as well as the operational lending categories: IDA, IBRD, and Blend, with the member composition of all groups used in the World Development Indicators.