The line graphs illustrate the variation in 
ownership
 of house electrical devices and the number of hours of housework in Use synonyms
households
 in one country Use synonyms
during
 1920 and 2019.
In general, as Change preposition
between
it 
can be seen from the charts, it is absolutely obvious that there was an upward Correct pronoun usage
apply
trend
 regarding electrical appliances during Use synonyms
this
 99-year period. Linking Words
In contrast
 to Linking Words
ownership
 of electrical devices, there was a downward Use synonyms
trend
 in terms of the amount of time spent doing housework in Use synonyms
households
.
In relation to the percentage of Use synonyms
households
 with electrical appliances, at first, in the year 1920, 40% of people had washing machines which Use synonyms
this
 amount Linking Words
about
 refrigerators and vacuum clears were 30% and nearly 0%, respectively. In detail, having refrigerators Change preposition
of
among
 Change preposition
in
households
 experienced an explosion from 1920 to 1960 and reached a plateau Use synonyms
at
 100% in 1980. Change preposition
of
Moreover
, Linking Words
ownership
 of vacuum cleaners saw  steady growth from 1920 to 2000 and at 2000 level off at 100%. At Use synonyms
last
, the Linking Words
ownership
 of washing machines had a slightly increasing Use synonyms
trend
 from 40% to just over 70% during these years.
Use synonyms
Furthermore
, Linking Words
although
 at first the Linking Words
Use synonyms
households
 who possess Correct quantifier usage
number of households
refrigerator
 were the lowest, it became the first place just after the year 1960. The only decrease during these years was related to Fix the agreement mistake
refrigerators
ownership
 of washing machines which experienced a shallow decline from 1960 to 1980. In terms of the other line graph, the number of hours spent doing housework in Use synonyms
households
 plummet significantly from 1920 to 1960 and Use synonyms
then
 from 1960 to 2019 the decreasing Linking Words
trend
 was slow.Use synonyms