Though this is a problem in many OECD countries, in America the proportion of out-of-pocket spending has declined sharply in the past few decades.

尽管这是很多经济合作与发展组织国家的共同问题，但在美国，现金支付比例在过去几十年间显著下降。

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Some experts are betting that in many parts of the country digging deep into one's pocket for a thick wad of crumpled, grimy bank notes will soon be a thing of the past.

CNN: HESE DAYS WHEN CHINESE