The given line graphs illustrate the percentage of households with electrical appliances and the time taken to do housework during the years between 1920 and 2019.

The first line graph shows the proportion of families having electrical appliances, and the second line graph presents the time spent on

housework

over a period of 99 years.

Overall

, the percentage of households who own washing

machines

, refrigerators and

vacuum

cleaners

all increased between 1920 and 2019,

while

the figure for

hours

taken to do

housework

presented a continuous downward trend. In 1920, the figure of families having refrigerators stood at about 3%, but experienced a dramatic increase over the following 60 years, and became the most popular electrical appliance in 1943, and consistently rose over the following 37 years until reached 100% in 1980. The percentages of families who have

vacuum

cleaners

and washing

machines

stood at approximately 30% and 40% respectively in 1920.

Vacuum

cleaners

saw a gradual rise between 1920 and 2000 (100%), and

then

remained steady. In 1960, the same proportion of households had

vacuum

cleaners

and washing

machines

, and the figure for washing

machines

slightly grew to roughly 75% in 2019. Regarding time consumed on

housework

per household. In 1920, 50

hours

were needed per week to deal with

housework

, and

then

significantly declined to about 15

hours

in 1980. After that, the

housework

time witnessed a slight downward trend, falling to just over 10

hours

in 2019.