The following chart demonstrates the percentage of households with electrical appliances and the number of hours of housework per week in one country from 1920 to 2019.
It can be seen that the percentage of all I usages ( washing machine, refrigerator, and vacuum cleaner ) increased noticeably.
While
the number of hours of housework dramatically fell.
In the first line, in 1920, the proportion of refrigerators sharply increased from 0 to 100 until 1989. After 2000, it steadily by 100. The letter, in 1920, the vacuum cleaner increased by 100 until 2000 and the same as the refrigerator, it steadily by 100, after 2000.
The Linking Words
last
one, in 1920, a washing machine steadily slightly increased by 70. Linking Words
This
is the minimum of usage.
In 1920, the number of hours of housework (washing clothes, preparing meals, and cleaning ) fell significantly from 50 to 20 until 1960. In 1960, steadily slightly reduced by 10.Linking Words
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