求翻译：20世纪70年代中期以后，住房供应不足得到了基本的缓解，公共住房建设逐年减少，这时美国政府开始对居民进行货币补贴政。是什么意思？

Since the mid-1970s, the housing shortage has been the basic mitigation, public housing construction decreasing, then the U.S. government began to subsidies for political currency on residents.

20th century since the mid 1970s, the housing supply is not sufficient to alleviate the basic of public housing construction, and has been on the decline, the Government of the United States began when the residents of subsidized government currency.

After 20th century 70's intermediate stages, the housing insufficient supply obtained the basic alleviation, the public housing construction reduces year by year, by now American Government started to the inhabitant to carry on the currency subsidy politics.

In the mid 1970 of the 20th century, the inadequate housing supply has been eased, decreasing public housing construction, when the United States Government begin monetary subsidies to residents and political.

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