On   
line
 chart above, there are three lines with three different colours. The first one is blue Correct article usage
the line
that
 Correct word choice
and
shown
 Wrong verb form
shows
of
 purposes how households Correct article usage
the of
using
 Wrong verb form
use
washing
 Add an article
a washing
the washing
Use synonyms
machine
. The second one is orange Fix the agreement mistake
machines
that 
Correct pronoun usage
apply
indicates
 the use of Wrong verb form
indicating
Use synonyms
refrigerator
. The Correct article usage
a refrigerator
last
 one is green Linking Words
that
 Correct pronoun usage
which
represented
 the vacuum cleaner. The data Wrong verb form
represents
taken
 from 1920 until 2019.
First of all, the use of washing Add a missing verb
was taken
Use synonyms
machine
 between 1920 Fix the agreement mistake
machines
until
 2019 Correct word choice
and
shown
 Wrong verb form
showed
the
 Correct article usage
an
increased
. But, in 1980, the using of washing Replace the word
increase
Use synonyms
machine
 Fix the agreement mistake
machines
got 
decreased and Verb problem
apply
increasing
 again in 2000. Wrong verb form
increased
Next, 
the use of Linking Words
Use synonyms
refrigerator
 highly increased from below 10 until the peak at 100 Fix the agreement mistake
refrigerators
Use synonyms
percent
. But, from 1980 until 2019 the percentage was Change the spelling
per cent
stagnan
. Correct your spelling
stagnant
Lastly
, the Linking Words
used
 of vacuum Replace the word
use
cleaner
 increased actively between 1920 Fix the agreement mistake
cleaners
until
 2000. In 2019, the stagnancy was shown Correct word choice
and
same
 as Correct article usage
the same
Use synonyms
refrigerator
.
Add an article
a refrigerator
Overall
, the Linking Words
all 
line always increased without a significant Correct determiner usage
apply
decreasing
. In detail, the Replace the word
decrease
used
 ofReplace the word
use
Add an article
 the 
 a 
Fix the agreement mistake
 refrigerators
refrigerator
 is the lowest in the start and washing Use synonyms
Use synonyms
machine
 is the highest with 40 Fix the agreement mistake
machines
Use synonyms
percent
. In 2019, Change the spelling
per cent
Use synonyms
refrigerator
 and vacuum Fix the agreement mistake
refrigerators
cleaner
 in Fix the agreement mistake
cleaners
same
 percentage, which is 100 Change the article
the same
Use synonyms
percent
. Change the spelling
per cent
Last
, washing Linking Words
Use synonyms
machine
 got 65 Fix the agreement mistake
machines
Use synonyms
percent
.Change the spelling
per cent