The given pie charts depict the information about the proportion of workers in involved manufacturing, sales, and service in town a and town b between 9060 and 2010.
Taking a general overview, it can be clearly seen that the most popular sector was manufacturing in both given year for Town b, while the highest rate of work in last given year in town a.
In town a, the percentage of manufacturing sector was highest at 41% in 1960, followed by a sharp decrease to 21% in 2010. There was a dramatic growth in sales of sector to 30% in initial year, this workers declined at 16% in 2010. The figure of service related jobs was more double (64%) in 2010.
The both given years, the portion for manufacturing jobs was highest at 70% and 58% form about 1960 to 2010 in town b. However, sales workers a slight increase at 20% in 1960 and 22% in 2010. Between 1960 and 2010, the percentile of service jobs also more in 10% and 25% respectively.