The line charts provided information on the changes in the presence of three different household equipment, as well as the durations of doing household chores in families in a nation during one century from 1920 to 2020.
Overall, the use of all three household appliances witnessed upward trends. Correspondingly, the total number of hours spent doing housework in families per week declined gradually during the time phase.
Looking into details, it is clear that the number of households installing refrigerators and vacuum cleaners sharply increased. In 1920, the percentage of families owning refrigerators and vacuum cleaners was approximately 5% and 30%, respectively. Subsequently, both the figures for refrigerators and vacuum cleaners experienced drastic growth, hitting one hundred percent of households using the former in 1980 and the latter in 2000, and remained unchanged until the end of the period. Similarly, the number of families having washing machines started off at 40% at the beginning of the period. Having risen to 70% in 1960, the figure fluctuated and finished at around 75% in 2020.
In accord with the mounting possessions of electrical appliances, the time length for housework underwent a steady decline. Families spent up to 50 hours each week doing housework. Then, the number of hours dropped years after years and ended at more than 10% in 2020.