The line graph illustrates the variations in the rate of families who owned the electrical equipment, plus the weekly average hours for doing the chores per household of an unknown nation between 1920 and 2019

The line graph illustrates the variations in the rate of families who owned the electrical equipment, plus the weekly average hours for doing the chores per household of an unknown nation between 1920 and 2019. It is manifest that there was an upward trend in three sections, which are washing machines, refrigerators and vacuum cleaners. By contrast, the amount of time each family spent doing housework dwindled significantly in 99 years since 1920. In 1920, the percentage of families that owned refrigerators stood at the lowest at 0% but later went up dramatically to 90% after 40 years. In the same period, the sections of washing machine and vacuum cleaner witnessed a moderate rise by 30% and 40% respectively to both reach 70%. From 1960, slight growth was seen in the proportions of ownership of refrigerators and vacuum cleaners before reaching a peak at 100% in 1980 and 2000 subsequently. They remained unchanged until 2019. However, 1980 saw a mild drop in possession of washing machine by 9%, followed by a slight increase about 11% to stayed at 72% in 2019. Standing at 50 hours, the number of hours conducting domestic duty declined sharply to 20 hours in 1960, then it fell gradually to reach the lowest at 10 hours in 2019.