"Figure 2: Infant and neonatal mortality rates for low birthweight babies: by age of mother, 2011","" "England and Wales","" "","" "Notes","1. Linked infant deaths (occurred in 2011) 2. Babies weighing less than 2,500 grams 3. Infant - deaths under 1 year 4. Neonatal - deaths under 28 days" "Unit","Rate per 1,000 " "","" "","Infant","Neonatal" "Under 20","38.5","29.0" "20–24","40.0","32.1" "25–29","33.9","26.3" "30–34","36.8","28.8" "35–39","35.2","28.6" "40 and over","38.0","31.0"