Seven years ago, according to Pew's previous study, the unaffiliated formed about 16% of the population, mainline Protestants were about 18%, Catholics were about 24% and evangelicals 26.3%.

CNN: Millennials leaving church in droves, study says

In the previous year, according to the ORR study compiled by transport consultants Steer Davies Gleave, Teesside Airport had only 18 passengers, Dorking West had 22 and Denton had 52.

BBC: Airport rail station 'had only 14 passengers in year'

Among older Americans who pull up stakes, a "large majority" settle within 20 miles of their previous homes, according to a 2009 Boston College study.

WSJ: Why Downsizing Your House May Not Solve Your Retirement Problems