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These charts illustrates the percentage of households with three electrical devices including washing machine, refrigerator and vacuum cleaner, and the number of hours doing housework per weak week, between 1920 and 2019. Overall, it is clear that the percentage of using (사용 비율이라고 써주면 정확하지 않습니다. 제시된 3가지의 가전제품을 보유한 가정의 비율로 써주셔야 합니다.)electrical devices generally increased every year while housework hours per week decreased. To look more closely, in the first chart, the percentage of using(마찬가지) refrigerator sharply increased from nearly 0% in 1920 to 90% in 1960. And(문장을 and, so, but 으로 시작하는 것을 피해주세요) almost every household started to use(이 정도의 표현은 괜찮을 것 같아요.) refrigerator in 1980. Moreover, the percentage of using vacuum cleaner was 40% in 1920, however whereas it became doubled in 1960. Until in 1960, the percentage of using washing machine was higher than that of having the vacuum cleaner, but it changed after in 1960. The percentage of using vacuum cleaner became 100% after in 2000. In the second chart, the hours of housework per week was 50hours in 1920. However, it dramatically dropped to 20 in 1960. Also, after in 1960, the housework hours per week is was under 20 hours until 2019. |