Irreligion in Sweden

Sweden is one of the world's most secular nations, with a high proportion of irreligious people. Phil Zuckerman, an Associate Professor of Sociology at Pitzer College, writes that several academic sources have in recent years placed atheism rates in Sweden between 46% and 85%, with one source reporting that only 17% of respondents self-identified as "atheist". Gallup Poll found in 2016 that 18% of Swedes self-report as atheist and 55% as non-religious.
Sweden's official website asserts that just three out of 10 Swedes state that they have confidence in the church. The article lists the following facts about religion in Sweden:
Statistics from the Church of Sweden states that:
Many Swedes attend church due to traditional or cultural reasons, but are otherwise not practicing Christians. One poll found that only 25% of Swedish people actually believe in Jesus.
Relatedly, the Swedish government has passed several secular reforms over the years; a legal opt-out of the previously mandatory 1.1% church tax was allowed in 1951, automatic birthright membership in the Church of Sweden - the organization's enrollment practice since the 1850s - ended in 1996, and the Church of Sweden was formally separated from the state in 2000, leaving Sweden as "the only Nordic country without a state church".