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“The first proper sample-based census was not carried out until 1949, so demographers have to reconstruct population totals from micro-level data on food supply, settlement patterns, village counts, birth records, and the like. The most sophisticated modeling by French and Belgian demographers variously suggests a population of 8 to 11 million in 1885 and 10 to 12 million by 1908. The Belgian Jean-Paul Sanderson, using a backward projection method by age cohorts, found a slight decline, from 10.5 million in 1885 to 10 million in 1910. This estimated change in total population governed by changing birth and death rates over a 25 year period represents a negligible annual net decline in population.” — Bruce Gilley
The first proper sample-based census was not carried out until 1949, so demographers have to reconstruct population totals from micro-level data on food supply, settlement patterns, village counts, birth records, and the like. The most sophisticated modeling by French and Belgian demographers variously suggests a population of 8 to 11 million in 1885 and 10 to 12 million by 1908. The Belgian Jean-Paul Sanderson, using a backward projection method by age cohorts, found a slight decline, from 10.5 million in 1885 to 10 million in 1910. This estimated change in total population governed by changing birth and death rates over a 25 year period represents a negligible annual net decline in population.