The yearbook tracks the Catholic population, both by a head count of the baptized in each country and as a percentage of the world's population.
John Paul liked scrambled eggs on bacon for breakfast. Benedict spent his free time playing the piano, reading, listening to classical music.
Pope Francis and members of his international Council of Cardinals discussed the possibility of allowing local bishops rather than the Vatican decide on certain matters.
The Vatican has released an online questionnaire to better understand the lives, attitudes and concerns of 16-to 29-year-olds around the world.