"Figure 3: Maternities with multiple births by age of mother, 1976, 2001 and 2011","" "England and Wales","" "","" "Notes","1. Multiple births arising from a single pregnancy are counted as one maternity. The number of maternities indicates the number of women having babies (including stillbirths) rather than the number of babies born" "Unit","Maternities with multiple births per thousand total maternities" "","" "Year","1976","2001","2011" "Under 20","6.2","6.3","6.5" "20-24","7.7","9.3","10.0" "25-29","10.5","12.9","13.2" "30-34","12.4","18.5","18.2" "35-39","13.4","21.0","23.6" "40-44","11.2","18.6","27.5" "45 and over","9.8","53.1","99.3"