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The image contains two line graphs, the first titled "Percentage of households with electrical appliances (1920-2019)" and the second titled "Number of hours of housework per week, per household (1920-2019)"; both x-axes range from 1920 to 2019 in increments of 20 years, and y-axes vary in scale and units. The first graph depicts 4 lines representing washing machines, refrigerators, vacuum cleaners and electric irons, with data points at 1920:0%, 1940:washing machines 20%, refrigerators 10%, 1960:washing machines 40%, refrigerators 50%, vacuum cleaners and electric irons 10%, 1980:washing machines 60%, refrigerators 90%, vacuum cleaners 20%, electric irons 30%, 2000:washing machines 80%, refrigerators 100%, vacuum cleaners 60%, electric irons 40%, 2019:washing machines 100%, refrigerators 100%, vacuum cleaners 80%, electric irons 70%. The second graph shows a single line for "Hours per week" declining from 1920:50, 1940:40, 1960:30, 1980:20, 2000:10, 2019:<5.
Given the complexity of the image, the above description may not be entirely accurate.
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The first graph shows the percentage pwnership of electrical appliances by type and the second graph compares the amount of time people on houseworks in the period from 1920 to 2019.
overall, the proportion of owning a certain type of electrical appliance increases which lead to the gradual desend of the average housework time.
As shown in the first graph, the percentage of family that own referigerator and that of washing machine saw the largest increase. Back to 1920, nearly none of the housejolds own a refrigerator, which remarkingly contrast with the situation after 1980, when nearly every household own one. This is also true for vaccum cleaners, which started off with only 30 percent ownership among families and had risen to 100% within 80 years. Compared with the former two, washing machine also saw increase in ownership, but with a smaller increase at a slower rate, only rising 25% in the years recorded.
The second graph shows the hours people on housework. The value dropped sharply from 50 in 1920 to 20 in 1960, before it entered a more gradual decrease to 10 hours in 2019.
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