The provided pie charts depict the ratio of workers in townA and town B among three separate realms, namely Manufacturing, Sales and Services between 1960 and 2010.
Overall, although Services were not the most well-liked industry in town A in 1960, they did become the most prominent industry fifty years later, surpassing two other industries in dominance. Conversely, Manufacturing, which had nearly dominated town B’s labor market in 1960, had lost its influence, leaving Sales and Services to grow considerably in 2010.
In Town A, the most significant change was the massive increase in the percentage of workers in manufacturing, which went from being the smallest industry in 1960 to the highest-demand occupation category in 2010 with 64% of all workers. The other two fields saw a drop which divided them in half roughly.
Town B saw significant adjustments as well; in 1960, the sales section accounted for nearly all of the total, but by 1971, its percentages had dropped by 17%. Interestingly, the percentage of workers in manufacturing more than doubled, from 10% in 1960 to 4% in 2010.