U.S. divorce rates: for various faith groups, age groups and geographical areas: "Barna's results verified findings of earlier polls: that conservative Protestant Christians, on average, have the highest divorce rate, while mainline Christians have a much lower rate. They found some new information as well: that atheists and agnostics have the lowest divorce rate of all. George Barna commented that the results raise 'questions regarding the effectiveness of how churches minister to families.' The data challenge 'the idea that churches provide truly practical and life-changing support for marriage.' "