For starters, services have been gaining ground worldwide, especially in developed economies. From 1970 to 2012, the GDP share of services in the OECD countries increased from 53% to 71%.
这一趋势的背后是工作性质的改变。首先，服务业在全世界兴盛，发达经济体尤其如此。从1970年到2012年，服务业占经合组织国家GDP的比重从53%上升到71%。