Aged 16-74. DSK2_PS - Digital Skills – Problem solving
List of conditions for DSK2_PS : CINSAPP1=1, CCONF1=1, IUSELL=1, IUOLC=1 or IUOLM=1, IUBK=1, IUJOB=1
  0 - If no condition from the following list is met, then 0 (no skills)
  1 - If one or two conditions are met, then 1 (basic)
  2 - If 3 or more conditions are met, then 2 (above basic)
  9 - Not applicable (IU=Blank or IU ne 1)

Individuals with basic problem solving skills
sum of IND_WGHT where (DSK2_PS=1)