然而，家庭支出调查显示，有五分之四的家庭年支出少于3000美元。
Yet household expenditure surveys show that four-fifths of families have less than $3,000 a year to spend.
结果主成分分析法构造的财富指数与家庭收入和支出调查一致性较好。
Results It was coherence between average income-consumption per person and wealth index constructed by the main component analysis.
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