Answer:
The methodology to make census has changed significantly during the last 100 years. Consider that demography, which is the science that studies human population has experienced big changes due to Information and Communication Technologies (ICTs). Back in 1920 was really difficult to track and keep accurate records on population rate and other variables as keeping real-time data was almost impossible. Once the first micro-processors appeared and allowed the creation of computers with the capacity of storing and processing data, it made easier the task for demography.
By 2010, creating a census was way easier as it was possible to apply the demographic methodologies (birth rate, death rate, population growth,etc) in real time in order to survey the information and present it.
Step-by-step explanation: