The given line graphs illustrate the changes in ownership of electrical appliances and the amount of time spent on housework in households of a specific country from 1920 to 2019.
Overall, the ownership of washing machines, refrigerators, and vacuum cleaners in households showed a consistent upward trend over the entire period, with refrigerators and vacuum cleaners reaching 100% ownership by 2019. Conversely, the time spent on housework per week declined steadily, dropping from 50 hours in 1920 to 15 hours in 2019.
The ownership of refrigerators started at just under 10% in 1920 and experienced rapid growth to 90% by 1960, with a slight increase after two decades, stabilizing at 100% ownership by 2019. Similarly, ownership of vacuum cleaners increased significantly from about 30% in 1920 to nearly 100% by 2000, holding steady until 2019. The ownership of washing machines fluctuated widely but showed an overall increasing trend, reaching over 70% by 2019.
The amount of time spent on housework peaked at approximately 50 hours per week in 1920 and gradually decreased to around 30 hours by 1960, and then further dropped to 15 hours per week by the end of the period.