While the article doesn't discuss this (I'm sure the writer doesn't even know the term, 'The Wall') the graphic is amazing.
Cities that predominantly had a surplus of men magically turn to a surplus of women as the dreaded wall crushes their youthful looks and 'charm'.
Young gentlemen, there is no need to fret as you age, since there will be an abundance of aging twats from which you may choose - to ignore - as you merrily go your own way!
"However, as the single population pushes past 50, the tables seem to turn, and single women start to outnumber their male counterparts, as this GIF of Soma's maps shows:"
http://cdn3.vox-cdn.com/uploads/chor...t_IyxGph.0.gif
Full article here: All the single ladies (and gentlemen, too) mapped - Vox