The charts below show the changes in ownership of electrical appliances and amount of time spent doing housework in households in one country between 1920 and 2019.

The line charts above clearly reflect the dramatic changes in the percentage of

households

with electrical appliances and the amount of time spent on doing housework in

households

, respectively, ranging from 1920 to 2019. As indicated in line chart one, there was a noticeable trend that an increasing number of

households

were measured with electrical appliances from 1920 to 2019. Especially, the proportion of

households

with refrigerators jumped from 0% to 90% sharply during the period from 1920 to 1960. At the same time, the changes in the rate of

households

with refrigerators and vacuum cleaners were steady. From 2000 to 2019,

households

relating to food containing and floor-sweeping were totally done by refrigerators and vacuum cleaners. In contrary, the percentage of

households

with washing machines drop slightly from 1960 to 1980 and steadily climb from 1980.

According to

line chart two, the number of hours of housework per week per household declined from 50h to 20h significantly until 1960, and

then

dip to 10h slowly by 2019. To be specific, we can see that the trend of the percentage of

households

with electrical appliances and the amount of time spent on doing housework in

households

is simultaneous in the past 100 years.