The line bar above gives information about five 
section
 of USA labour force employment between 1930 and 2010.
Change to a plural noun
sections
Overall
, except for farming,fishing and foresting which experienced Linking Words
downward
 trend and other services that Correct article usage
a downward
was
 steady, other sectors Change the verb form
were
such
 as industrial, sales Linking Words
and 
office and technical had witnessed upward trends.
The farming,fishing and foresting rate started at over 70% in 1930 and by the year 1970 it Correct word choice
apply
decrease
 quickly Wrong verb form
decreased
anf
 Correct your spelling
and
finally
 hit the bottom line Linking Words
at
 2010 with nearly 5 percentages.Change preposition
in
Linking Words
Also
 other services section didn't fluctuate much during Add a comma
Also,
this
 period of 80 years.
Other sections Linking Words
such
 as industrial, sales Linking Words
and 
office and technical started at Correct word choice
apply
low
 rate Add an article
a low
about
 10% and over 80 Change preposition
of about
year
 they had Change to a plural noun
years
gradual
 increase and Correct article usage
a gradual
Correct pronoun usage
their rates
rates
 Fix the agreement mistake
rate
of 
Change preposition
apply
them 
Correct pronoun usage
apply
at the end
 of year 2010 was 35%,
20% and 35% Linking Words
perspectivly
.Correct your spelling
respectively