"Figure 4: Unexplained infant death rates, by NS-SEC of parents, 2012 (1,2,3)","" "England & Wales","" "","" "Notes","1. Based on the dominant NS-SEC of the mother or father at death registration. Information on NS-SEC of the father outside marriage is not collected if the father does not attend the registration of the baby's birth. 'All' will include cases where the father's NS-SEC is not stated 2. Based on deaths occurring in each calendar year 3. Data for 2012 are provisional " "Unit","Rates per 1,000 live births" "","" "","Managerial and Professional","Intermediate","Routine and Manual" "All joint registration","0.1","0.19","0.35" "Outside marriage joint registration","0.17","0.27","0.39" "Inside marriage","0.07","0.12","0.29"