PERNUM and other individual-level variables are only preselected if you have other individual-level variables in your cart. However, you only selected HHINCOME and FTOTINC, both of which are household-level variables. Therefore, your extract defaults to only showing households, for which PERNUM is unavailable. If you want to include both individual and household data, you first want to add a person-level variable to your extract. Then, when you’re on the Extract Request screen, select Data Structure. This will let you choose whether you want a rectangular (person), hierarchical, or household only data structure. A hierarchical structure will include both household data followed by person-level data for each corresponding household.
