emeth i think 8,5 million will be reached in 2016 9,2 milllion in 2020, 10 milllion in 2024
If you project forward at the trend we see today (about an extra 150-160k per year (average taken over last five years) ), then emeths figures look about right.
What's not factored in is that the older ones are hanging in there, but the younger ones are not, so there will come a tipping point when there are more old ones dying off than there are younger ones joining.
Splash