"Figure 4: Babies of mothers under 20 have a higher risk of unexplained infant mortality ","" "All unexplained infant deaths by age of mother, England and Wales, 2004 to 2019p","" "","" "Notes","" "Unit","Death per 1000 live births (rate)" "","" "","Under 20","20-24","25-29","30-34","35-39","40 and over" "2004","1.33","0.83","0.4","0.28","0.34","0.24" "2005","1.32","0.85","0.46","0.28","0.28","0.22" "2006","1.3","0.72","0.37","0.2","0.2","0.42" "2007","1.16","0.65","0.39","0.18","0.22","0.24" "2008","1.07","0.68","0.34","0.23","0.26","0.23" "2009","1.23","0.59","0.37","0.26","0.21","0.22" "2010","1.08","0.62","0.33","0.21","0.16","0.18" "2011","0.82","0.53","0.32","0.22","0.23","0.34" "2012","0.92","0.57","0.28","0.21","0.16","0.27" "2013","1.3","0.56","0.29","0.26","0.22","0.34" "2014","1.23","0.57","0.32","0.17","0.16","0.14" "2015","0.79","0.39","0.33","0.2","0.17","0.14" "2016","0.98","0.58","0.32","0.23","0.17","0.34" "2017","1.18","0.52","0.28","0.15","0.18","0.17" "2018","1.21","0.56","0.36","0.18","0.22","0.28" "2019p","0.96","0.45","0.27","0.18","0.2","0.17"