Religion in the Netherlands was predominantly Christianity until late into the 20th century. Although religious diversity remains, there has been a decline of religious adherence. In 2006, 34 percent of the Dutch population was a church member. In 2015 almost 25 percent of the population adheres to one of the Christian churches (11.7% Roman Catholic, 8.6% PKN, 4.2% other small Protestant denominations), 5 percent is Muslim and 2 percent adheres to Hinduism or Buddhism, based on independent in-depth interviewing by Radboud University and Vrije Universiteit Amsterdam. Approximately 67.8% of the population in 2015 has no religious affiliation, up from 61% in 2006, 53% in 1996, 43% 1979 and 33% in 1966. The Sociaal en Cultureel Planbureau (Social and Cultural Planning Agency, SCP) expects the