The given line graphs illustrate the percentage of households with electrical appliances and the time taken to do housework during the years between 1920 and 2019.

The first line graph shows the proportion of families having electrical appliances, and the second line graph presents the time spent on

housework

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over a period of 99 years.

Overall

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, the percentage of households who own washing

machines

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, refrigerators and

vacuum

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cleaners

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all increased between 1920 and 2019,

while

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the figure for

hours

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taken to do

housework

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presented a continuous downward trend. In 1920, the figure of families having refrigerators stood at about 3%, but experienced a dramatic increase over the following 60 years, and became the most popular electrical appliance in 1943, and consistently rose over the following 37 years until reached 100% in 1980. The percentages of families who have

vacuum

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cleaners

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and washing

machines

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stood at approximately 30% and 40% respectively in 1920.

Vacuum

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cleaners

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saw a gradual rise between 1920 and 2000 (100%), and

then

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remained steady. In 1960, the same proportion of households had

vacuum

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cleaners

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and washing

machines

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, and the figure for washing

machines

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slightly grew to roughly 75% in 2019. Regarding time consumed on

housework

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per household. In 1920, 50

hours

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were needed per week to deal with

housework

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, and

then

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significantly declined to about 15

hours

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in 1980. After that, the

housework

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time witnessed a slight downward trend, falling to just over 10

hours

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in 2019.