The chart illustrates 
what
 Correct word choice
that
number
 of individuals per Correct article usage
the number
household
 has changed over the period of 20 years in the country UK. Use synonyms
Overall
, there used to be more Linking Words
number of 
individuals who used to live in a single Correct quantifier usage
apply
household
 compared to the next 20 Use synonyms
years
 data.
In 1981, Change noun form
years'
The 
Correct article usage
apply
people
 used to live more together in a Use synonyms
household
 compared to a Use synonyms
single person
 Add a hyphen
single-person
household
. Relatively it could be the reason Use synonyms
of
 having a joint family in 1981. In a Change preposition
for
household
 there used to be 6 Use synonyms
people
 which has Use synonyms
substancially
 fallen down and in 2001 it has dropped to two households who are living with more than 6 Correct your spelling
substantially
people
. 
When Use synonyms
looked
 at the Wrong verb form
looking
two person
 Add a hyphen
two-person
household
 there can be Use synonyms
a 
merely different Correct article usage
apply
numbers
 but they are yet almost the same. What immense change could be seen is in the single person Correct the article-noun agreement
number
household
 where in 1981 it used to be 17 households and in 2001 it has immensely increased to 26 households. Use synonyms
Due to
 inflation and other interpersonal relationship Linking Words
problem
 Fix the agreement mistake
problems
people
 in 2001 Use synonyms
has 
preferred to live Unnecessary verb
apply
to 
alone  compared to the past 20 Change preposition
apply
years
 record.Change noun form
years'