The line graphs show data on the ownership of household devices and the duration of housework done by families in a country between 1920 and 2019.
Overall, the possession of household machines had significantly increased since 1930, with refrigerators and vacuum cleaners being owned by every family. As a result, the amount of housework needed to be done by people declined proportionately.
According to the first graph, refrigerators were a rare commodity in houses in 1920, but their presence soared afterwards. Since 1980, every family in this country had been owning this device at home. A similar, but much smoother trend can be observed with vacuum cleaners, which were present at 3 of ten houses a century ago but are now held by 100% of all homes. Lastly, washing machines were owned by 40% of families in 1920 and reached 70% in just four decades. These days, it has remained just over 70%.
The second line chart indicates a direct correlation between the acquisition of essential household tools and the amount of work required to be done at home. Household work amount dropped dramatically from a high 50 hours per week in 1920 to a mere 10 hours per week in 2019.