The First Censuses and the History of Statistics in Mexico

During the viceregal period, the population of New Spain was counted various times. However, censuses, which can be called modern, did not begin until the end of the 18th century. The most important of these is the so-called Revillagigedo census, which led to a very interesting debate: should the population be counted one by one or is it better to calculate it with indirect data? This is a problem that continues to exist in the 21st century. In 1812, under the Constitution of Cádiz, all provinces, including overseas ones, were asked to carry out censuses and produce statistics, which led to a proliferation of figures during the first years of the War of Independence and afterward. From 1826 onward, “deviation from the norm” was registered. It was now important not only to count inhabitants but also to calculate how many criminals there were and how many sick people were registered in the statistics, which led to an effort at quantification. Both public officials and those regarded as “wise,” the scientists of the day, were interested in statistics. The low crime rate in Mexico City compared to Paris led to the assumption of the existence of an exceptional “Mexican type of man” with a very low percentage of criminals. The regularity offered by the “Law of Great Numbers” fascinated the inhabitants of the 19th century. However, in the second half of the century, statistical bulletins contained very grim data. Some doctors concerned with collecting statistics—who were actually public health reformers—produced terrible numbers; the mortality in Mexico City was horrifying. In order to verify and compare data, there was a great demand to create a specialized central office. This was founded in 1882 and was given the task of carrying out censuses at the end of the 19th century, something done successfully.