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The charts illustrate changes in the proportion of households owning electrical appliances and the average amount of time spent on housework per week in one country between 1920 and 2019.

Overall, ownership of all three household appliances — washing machines, refrigerators, and vacuum cleaners — increased significantly over the period, while the number of hours spent on housework dropped dramatically. This indicates that technological advances greatly reduced the domestic workload.

In 1920, only 30% of households had a vacuum cleaner, and even fewer owned a washing machine (around 40%), while almost no one had a refrigerator. By 1960, refrigerator ownership had risen sharply to 90%, overtaking the other two appliances. Washing machines and vacuum cleaners also saw steady growth, reaching about 70% and 65% respectively. By 2019, nearly all households possessed refrigerators and vacuum cleaners (almost 100%), and the figure for washing machines had climbed to roughly 75%.

In contrast, the time spent on housework per household decreased continuously from 50 hours per week in 1920 to around 15 hours by 1980, and further to just 10 hours in 2019. This steady decline reflects the impact of modern technology on household efficiency.