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Mostly the new residents belong to the middle class and they have the possibilities of buying houses cheaper than in the city centre and with high standards of life (residential complexes with gym, swimming pool, garden, shopping centre and all the facilities of the so called “modern life”). The increase in population and the urbanized area has been spectacular, as is showed below:
1990: 2.000 inhabitants
2000: 39.884 inhabitants
2007: 112.131 inhabitants
2008: 122.452 inhabitants
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