The linechart depicts the labour force employment in the USA from 1930 2010.
Overall, It can be seen that there were an upward trend in four patterns: Industrial, technical, sales and office and other service. Farming, fishing and foresting on the other hand, were decline over the period.
At the beginning of the period, the figures of industrial, technical, sales and office and other services were nearly equal, around 5 in 1930 then, the industrial and technical were increased slightly to 1970 about 10. Meanwhile, the sales and office and order services had a gradual fluctuation in 40 years from 1932 to 1970 and reached about 10 in 1970.
In the second half of the period, the amount of industrial had a significant increase and reached its peak at 38 in 2010. Technical, sales and office went up to 20 and 30 in succession from 1970 to 2010. At the same town the arduous device had a stability in 40 years from 1970 to 2010 and stayed about 10 at the end of the period.
Farming fishing for a sting on the other hand, The figures started in the first half of period with the highest about 80. After that, the amount had a downward trend to 1970.
