The pie charts illustrate the distribution of employment in three fields in town A and town B in 1960 and 2010.
Overall, the percentage of people working in services in town A witnessed the most pronounced increase, surpassing the figures for the other fields in 2010. Also of note is that manufacturing was the most employed occupation in town B.
In 1960, the major workers in town A and B were manufacturers, accounting for 41% and 70%, respectively, compared to 29% and 10% in the services area. 30% of people in town A were employed in sales, exceeding that of town B with a disparity of 10%.
During 50 years, the percentage of services workers in town A witnessed a significant increase, from 29% to 64%, taking the priority of the entire chart in 2010. Despite experiencing a decrease from 70% to 53%, the proportion of those who were manufacturers in town B remained higher than the remaining sectors. Sales and services in town A both saw a fall in the number of workers, with the former going down from 30% to 16%, and the latter falling from 41% to 20% at the end of the period