The line chart illustrates the labour force 
employment
 in economic industrial Replace the word
employed
sectors
 during the period from 1930 to 2010 in Use synonyms
USA
. These five economic Correct article usage
the USA
sectors
 include Use synonyms
industrial
 Correct article usage
the industrial
sector
, sales and office, farming and fishing and forestingUse synonyms
,
 technical Remove the comma
apply
sector
, and other services.
Use synonyms
The employment
 in the Correct article usage
Employment
sector
 of farming, fishing and foresting played a less significant role during Use synonyms
Linking Words
this
 30 years. It had the highest percentage at the beginning, close to 80% in 1930, Correct determiner usage
these
then
 gradually dropped to 60% in 1970, and after that, dramatically fell close to 1% Linking Words
in
 the end of the period. 
Before 1970,  the employment of three Change the preposition
at
sectors
 ( technical, sales and office, and  industrial) presented with zig-zag trends, sitting between 0 to 15%. After 1970, the figure Use synonyms
of
 these Change preposition
for
sectors
 presented upward trends. Use synonyms
Industrial
 Add an article
The industrial
sector
 had a sharp increase until 2000 and Use synonyms
then
 flatted out close to 40%, the highest percentage among Linking Words
the 
all Remove the article
apply
sectors
 in 2010. So did Use synonyms
Add an article
the sale
sale
 and office Fix the agreement mistake
sales
sector
, but with Use synonyms
low
 increase rate, about 35% in 2010, the Correct article usage
a low
third
 highest figure. The technical Linking Words
sector
 presented a sharp increase in the Use synonyms
last
 30 years with about 35% in 2020. 
The Linking Words
sector
 of other services increased at the beginning and peaked in 1940 Use synonyms
with
 about 15%. Since Change preposition
at
then
, it decreased gradually to about 10% in 1970 and flatted out until the end of the period.
Allover, Linking Words
agricultural
 Add an article
the agricultural
sector
 has played a less significant role in Use synonyms
USA
 workforce market since 1930 and the two Correct article usage
the USA
sectors
 (industrial and technical) have become more important daily Use synonyms
with 
occupying about 30% individually.Change preposition
apply