The upper line graph depicts the percentage of 
housholds
 owning three electrical appliances-washing Correct your spelling
households
machine
, Fix the agreement mistake
machines
refrigerator
 and Fix the agreement mistake
refrigerators
Use synonyms
vaccum
 Correct your spelling
vacuum
cleaner
- from 1920 to 2019 in a certain country, Fix the agreement mistake
cleaners
while
 the lower chart demonstrates the number of weekly Linking Words
hours
 of household chores during the same period.
Use synonyms
Overall
, there was a dramatic increase in the ownership of all three electrical devices, where refrigerators and Linking Words
Use synonyms
vaccum
 cleaners were Correct your spelling
vacuum
owened
 by every household by the end of the given period. Correct your spelling
owned
This
 has been mirrored Linking Words
on
 the number of Change preposition
in
hours
 of housework per week which Use synonyms
had
 dramatically declined throughout the Wrong verb form
has
last
 six decades.
At the beginning of the time, in 1920, almost all houses had no refrigerator, Linking Words
however
, 30% and 40% of them owned a Linking Words
Use synonyms
vaccum
 and a washing machine, respectively. Over the next forty years, the fridge's  ownership significantly jumped to 90 Correct your spelling
vacuum
percent
, Change the spelling
per cent
whereas
 the other two cleaning appliances rose to the same level of 70%. From 1960 onwards, the percentage of washing machine owners slightly fluctuated before slowly going up to approximately 75%, Linking Words
while
 Linking Words
households
 percentage having refrigerators and Change noun form
households'
household's
Use synonyms
vaccum
 cleaners continued to rocket to 100% in 2000 and leveled off till 2019.
Correct your spelling
vacuum
This
 substantial rise in appliances' ownership was reflected Linking Words
on
 the total Change preposition
in
hours
 spent on housework weekly as they Use synonyms
were 
declined from 50 Unnecessary verb
apply
hours
 to 20 Use synonyms
hours
 of chores in 1960. Use synonyms
This
 was followed by a slight decrease to 10 Linking Words
hours
 throughout the next six decades.Use synonyms