The given pie charts compare the distribution of employment in three different sectors in town A and town B in 1969 and 2010.
Overall, town A saw a significant increase in the percentage of people working in service-related jobs, the opposite was true in the case of the manufacturing and sales sectors. Furthermore, the manufacturing sector employed the highest proportion of workers in town B.
Looking at town A, in 1960, manufacturing-related jobs were preferred by the greatest percentage of residents, with the figure standing at 41%. However, after 50 years, this proportion decreased twofold to 20%. Likewise, the figure for the sales sector experienced a downward trend from 30% to 16% between 1960 and 2010. In terms of the service sector, despite starting at only 29% in 1960, this figure went up substantially to 64% in the final year.
Regarding town B, the manufacturing sector attracted the majority of workers, in spite of a drop from 70% in 1960 to 53% in 2010. In contrast, the sales and service sectors saw an increase in the percentage of employees of 15% and 2%, respectively.