The pie charts 
depicts
 the percentage of money Change the verb form
depict
spending
 on Replace the word
spent
life
 needs of individuals in Correct article usage
the life
UK
 in 1971 and 2001. 
Correct article usage
the UK
Overall
 The most expenditure takes Linking Words
cars
 production and  investments Fix the agreement mistake
car
on
 nourishment, Change preposition
in
while
 over time needs for gadgets and paper books fluctuate
 
Linking Words
Firstly
 , in 1971 people mostly Linking Words
tend
 to Wrong verb form
tended
spent
 Change the form of the verb
spend
one half
 of their  budget on food supplements and Add a hyphen
one-half
one fifth
 of Add a hyphen
one-fifth
salary
 on vehicles 
The Identical picture we see in 1971,   Correct pronoun usage
their salary
as well as
 Linking Words
in 
nowadays the tangible share namely nearly 10-12 Change preposition
apply
percent
 of family income was devoted to the petrol
Change the spelling
per cent
Secondly
, after 30 years ,priorities of The Linking Words
Uk
 residents have changed dramatically since the expenses for food provision Correct your spelling
UK
has
 declined by three times and had only 14 Correct subject-verb agreement
have
Fix the agreement mistake
percent
percents
 
Correct your spelling
per cent
In contrast
 with Linking Words
past
 progressive Add an article
the past
a past
manufacturer
 of cars and computers caused Fix the agreement mistake
manufacturers
rise
 in expenditure, Correct article usage
a rise
hence
 ,Linking Words
doubled
 spending on cars and significantly Wrong verb form
 doubling
increased
 demand Wrong verb form
increasing
on
 Change preposition
for
PC
 and laptopsFix the agreement mistake
PCs