 According to a study published in 2001, 23% of the inhabitants were either atheist or agnostic.A Gallup poll conducted in 2012 found that 57% of Icelanders considered themselves "religious", 31% considered themselves "non-religious", while 10% defined themselves as "convinced atheists", placing Iceland among the ten countries with the highest proportions of atheists in the world.Icelanders registered in the state church, the Church of Iceland, is declining at a rate of more than 1% per year.