The bar chart provides key information about the 
unit
 of Fix the agreement mistake
units
houses
 built annually in Use synonyms
Derby
 and Use synonyms
Nottingham
. The Use synonyms
units
 are measured in the number of Use synonyms
houses
.
Use synonyms
Overall
, it is clear from the chart that there Linking Words
are
 a significant increase Change the verb form
is
of
 housing Change preposition
in
among
 the period of 2000 to 2009. Change preposition
during
In addition
, Linking Words
Derby
's Use synonyms
houses
 were Use synonyms
in
 Change preposition
at
the
 peak in 2009, Change the word
their
whereas
 the number of homes built in Linking Words
Use synonyms
Nottingham's
 was high in 2008.
Change noun form
Nottingham
According to
 what is shown from the chart, Linking Words
Linking Words
initially
 Add a comma
initially,
houses
 in Use synonyms
Derby
 were less than 50 for two years. In 2002 it faced a slight increase to roughly 70, Use synonyms
while
 in the next year it passed 100 Linking Words
units
. For the next 4 Use synonyms
years
 it Add a comma
years,
grown
 to more than 100 and remained constant. During 2008, the number of homes in Add the auxiliary verb
has grown
grew
Derby
 jumped to more than 250 Use synonyms
as well 
Linking Words
as
 in 2009 it increased by 100 Correct word choice
and
units
.
In terms of Use synonyms
Nottingham
, it started with 50 residences with a slight increase in 2001 to more than 50. In 2002 it plunged nearly to 20. Throughout the interval of 2003 to 2005 it increased gradually until it reached roughly 80 villas. Building of accommodations in 2006 dropped to less than 50, Use synonyms
on the other hand
 in 2007 it faced a significant growth to around 200 Linking Words
units
. In 2008 Use synonyms
Nottingham
's Use synonyms
houses
 Use synonyms
decrease
 sharply nearly to 20 villas, Wrong verb form
decreased
Linking Words
however
 in Add a comma
however,
2009
 it reached 250.Add a comma
2009,