联合国贸易与发展会议数据库http://unctadstat.unctad.org
查询的时候,左框点开International trade in goods and services,
然后在右框点开Trade structure by partner, product or service-category,
接着选择要服务贸易的Services (BPM5): Exports and imports by service-category, value, shares and growth, annual, 1980-2013
注意点开后但凡有下划线的词都可以再次点开进行筛选,比如点击ECONOMICS之后可在Individual economies项目下选择国家