Roman Catholicism is by far the largest denomination present in Spain. According to a study by the Spanish Centre for Sociological Research in 2014 about 68% of Spaniards self-identify as Catholics, 2% other faith, and about 27% identify as atheists or declare they have no religion.[1] Most Spaniards do not participate regularly in religious worship. This same study shows that of the Spaniards who identify themselves as religious, 61% barely ever goes to mass, 14% go to mass few times a year, 10% few times per month and 14% every Sunday or multiple times per week. Although a majority of Spaniards are Catholics, most, especially those of the young generation, ignore the Church's conservative moral doctrines on issues such as pre-marital sex, sexual orientation or contraception.[2][3][4][5] The total number of parish priests has shrunk from 24,300 in 1975 to 19,307 in 2005. Nuns also dropped 6.9% to 54,160 in the period 2000-2005.[6]