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In page Dordogne:

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The population peaked at 505,789 in 1851 according to that year's census. After that the population declined to 373,000 by 1975. This reflected the long term population decline observed in many of the rural departments resulting from changes in agriculture and the lure of higher industrial wages available in more urbanized regions.[citation needed] Between 1975 and 2010, the population increased again, reaching 415,000.[2]