http://webarchive.nationalarchives.gov.uk/20160105160709/http:/www.ons.gov.uk/ons/rel/vsob1/births-by-area-of-usual-residence-of-mother–england-and-wales/2012/sty-international-comparisons-of-teenage-pregnancy.html
http://webarchive.nationalarchives.gov.uk/20160105160709/http:/www.ons.gov.uk/ons/rel/vsob1/births-by-area-of-usual-residence-of-mother–england-and-wales/2012/sty-international-comparisons-of-teenage-pregnancy.html