"Figure 4: Live births: birthweight (grams) for singleton and multiple births, babies born in 2011","" "England and Wales","" "","" "Notes","" "Unit","Percentage of live births with a known birthweight" "","" "","Singletons","Multiple births" "Less than 1000","0.4","3.5" "1000 - 1499","0.5","6.3" "1500 - 1999","1.0","14.5" "2000 - 2499","3.6","31.9" "2500 - 2999","15.8","32.7" "3000 - 3499","36.5","9.9" "3500 - 3999","30.3","1.1" "4000 and over","11.8","0.1"