I’m examining the population among people in families by geographic area. Adding together the totals in principal cities and suburban and rural areas, it looks like the total family population is about 99 million in 2011 and 2012. Then in 2013, the total drops significantly to about 71 million. Why is that happening?
At the same time, it looks like the missing data rate for geography type jumped from 37% to 55% between 2012 and 2013.
Could you please help with an explanation for those changes?