It has grown decades ago and stayed high. In this graph, the vertical gray line is 2006 (peak). The same rate seems to be going back to the 80s http://www.pew

It has grown decades ago and stayed high. In this graph, the vertical gray line is 2006 (peak). The same rate seems to be going back to the 80s http://www.pewsocialtrends.org/files/2016/05/ST_2016.05.24_young-adults-living-05.png http://www.pewsocialtrends.org/files/2016/05/ST_2016.05.24_y... wish they had better graphs.