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

the line charts illustrate the percentages of the electronic

appliances

used in the house consisting of three electronic

appliances

and the number of hours between 1920 and 2019.

Overall

, the percentage of electrical

appliances

rose throughout the year and the number of hours declined over the period. In terms of electronic

appliances

, it began in 1920, the refrigerator was only zero per

cent

of

households

. In the next 50

years

, the refrigerator was significantly inclined to 100 per

cent

of

households

then

steadily until the end of the period. If we compared it to the vacuum cleaner, the

trend

probably was almost the same with refrigerators. It started at 30 per

cent

of

households

in 1920

then

rose steadily to the peak per

cent

in 2000 at 100 per

cent

of

households

.

On the other hand

, the

trend

of the washing machine fluctuated throughout the year. It began at 40 proportion in 1920 in the next 99

years

, the percentage of

households

washing machines increased to 70 percent by the end of the

years

. In the next line chart, the number of hours of housework per week was the highest percentage in the first year at 50 per

cent

. In the next 40

years

, the

trend

constantly decreased to 20 per

cent

. Over

than

Change preposition

apply

show examples

20

years

which was between 1980 and 2000, the

trend

presumably steady approximately at 15 per

cent

then

declined to over 10 per

cent

by the end of the period.