Christianity in Korea (Re: Pew Research Article)

Thanks for that interesting article!  While the article was written in 2014, the data used for the article was collected in 2010.  Do you think the percentages have stayed pretty much the same over this past decade?  I can't think of any, but can you think of any factors which would influence the numbers of reported Christians, Buddhists, nonreligious, etc. to change?