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 first line graph compares the amount of families with their electrical usage,

while

the second one shows how much time each household per week doing housework over a

period

of 99 years.

Overall

, the usage of electrical devices from 1920 until 2019 had an increasing

trend

,

whereas

the total hours of housework during a week had a decreasing

trend

until the end of the

period

. As shown in the first line graph, the initiation percentage of using washing machines and vacuum cleaners was larger than that of refrigerators (40%, 30%, and 3% respectively).

Moreover

, their positions reversed and the percentage of using refrigerators and vacuum cleaners overtook that of washing machines.

Also

, the proportion of using refrigerators experienced a significant rise until 1980 and reached 100%.

However

, it remained stable until the end of the

period

,

while

that of vacuum cleaners had an increasing

trend

until 2000 and remained static until 2019.

In addition

, despite all fluctuations the percentage of using washing machines had a growing

trend

and reached 75% in 2019.

According to

the second line graph, the amount of housework hours experienced a dramatic decline from 1920 until 1960 and became 30% lower (20%). From 1960 to 2019 the hours fluctuated and reached about 10% (11%)

at the end

of the

period

.