The pie charts are illustrated the percentage of population jobs in various sectors in Town A and B in two years, 1960 and 2010.
Overall, the diagrams show how the work of the population of the two cities has changed over the course of half a century.
Firstly, in the city of A in 1960, highest rate was for sale, in 2010 this figure decreased be two indicators. Than, in the town A, the smallest indicator was the manufacture of 29%, whichs has doubled since half a century ago. The servise and sales decline almost doubled.
Furthemore, in city of B in 1960, highest rate was sales, in 2010 this number decreased 17%. After that the servise and manufacturing rised. The servise drown 2% and manufacturing climb almost doubled.
Finally, in both cities the manufacture has doubled and the servis reduced. The city has turned from a trade into a manufactureing city and remains a trading city as before.