By the mid-seventeenth century, the population of the Spanish settlements and their surroundings numbered approximately 100,000. This population grew to about 500,000 by mid-eighteenth century and to one million by 1830. Those with European blood were concentrated in central Chile, between Santiago and Concepcion; few settled in the northern and southern regions. This pattern of dispersion began to change only in the second half of the nineteenth century, with the rapid growth of mining activities and the inmigration of non-Iberaian Europeans.