That is just one of the many interesting tidbits to be gleaned from a 2010 paper by Barro, McCleary, and McQuoid titled, The Economics of Sainthood (a preliminary investigation):
Saint-making has been a major activity of the Catholic Church for centuries. The pace of sanctifications has picked up noticeably in the last several decades under the last two popes, John Paul II and Benedict XVI. Our goal is to apply social-science reasoning to understand the Church’s choices on numbers and characteristics of saints, gauged by location and socioeconomic attributes of the persons designated as blessed.
Another interesting fact is that after years of service, popes apparently get tired of saint-making: