The pie charts illustrate the proportions of people who worked in manufacturing, sales, and services sectors in town A and town B in the years 1960 and 2010.
Overall, while the figures for all sectors were almost similar in town A in 1960, services had become the most popular field by 2010. Meanwhile, the majority of people in town B worked in manufacturing in both years.
Starting with town A, the percentage of individuals working in sales experienced a considerable rise, from 29% in 1960 to 64% by 2010. In contrast, the figures for the other two sectors, manufacturing and sales, decreased from 41% in 1960 to 20% in 2010 and 30% in 1960 to 16% in 2010, respectively.
When it comes to the town B, there was a 15-percent-point increase in the proportion of people who were working in the services sector, rising from 10% in 1690 to 25% in 2010. 22% of people worked in the sales field in 2010, up from 20% in 1960. Lastly, the figure for those who worked in manufacturing stood at 70%, a figure that then fell to 53%, representing the largest overall change.