<P> The Census Inegi in Mexico is the Instituto Nacional de Estadística y Geografía (INEGI). The National Population Council (CONAPO), is an institution under the Secretary of the Interior in charge of the analysis and research of population dynamics . The National Commission for the Development of Indigenous Peoples (CDI), also undertakes research and analysis of the sociodemographic and linguistic indicators of the indigenous peoples in Mexico . </P> <P> In 2017, Mexico's total fertility rate dropped below replacement - level fertility for the first time (i.e., less than 2.1 children born per woman). </P> <Table> <Tr> <Th_colspan="3"> Historical population </Th> </Tr> <Tr> <Th> Year </Th> <Th> Pop . </Th> <Th> ±% </Th> </Tr> <Tr> <Th> 1865 </Th> <Td> 8,259,080 </Td> <Td>--</Td> </Tr> <Tr> <Th> 1910 </Th> <Td> 15,160,369 </Td> <Td> + 83.6% </Td> </Tr> <Tr> <Th> 1921 </Th> <Td> 14,334,780 </Td> <Td> − 5.4% </Td> </Tr> <Tr> <Th> 1930 </Th> <Td> 16,552,722 </Td> <Td> + 15.5% </Td> </Tr> <Tr> <Th> 1940 </Th> <Td> 19,653,552 </Td> <Td> + 18.7% </Td> </Tr> <Tr> <Th> 1950 </Th> <Td> 25,791,017 </Td> <Td> + 31.2% </Td> </Tr> <Tr> <Th> 1960 </Th> <Td> 34,923,129 </Td> <Td> + 35.4% </Td> </Tr> <Tr> <Th> 1970 </Th> <Td> 48,225,238 </Td> <Td> + 38.1% </Td> </Tr> <Tr> <Th> 1980 </Th> <Td> 66,846,833 </Td> <Td> + 38.6% </Td> </Tr> <Tr> <Th> 1990 </Th> <Td> 81,249,645 </Td> <Td> + 21.5% </Td> </Tr> <Tr> <Th> 2000 </Th> <Td> 97,483,412 </Td> <Td> + 20.0% </Td> </Tr> <Tr> <Th> </Th> <Td> 113,580,528 </Td> <Td> + 16.5% </Td> </Tr> <Tr> <Th> 2018 </Th> <Td> 123,982,528 </Td> <Td> + 9.2% </Td> </Tr> <Tr> <Td_colspan="3"> Source: INEGI </Td> </Tr> </Table> <Tr> <Th_colspan="3"> Historical population </Th> </Tr>

What was the population of mexico in 1940