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Statistics below show the percentage of householders with electrical appliances (washing machine,refrigerator and vacuum cleaner)in the period from 1920-2019 Overall,the smallest percentage of households in the 1920,due to it is the beginning,and the biggest percentage of households in 2019. Firstly,in 1920 refrigerators were not used at all,while only 30% of households owned vacuum cleaner in […]