Thanks for the responses so far. Let me explain this another way. The spreadsheet visual I included before is accurate of the data. It's a comprehensive table of obs that has been grouped by vehicle type. What i'm trying to add is 'for any grouping (car_type) i want it to have (car, van, suv), if van is missing, insert it' so ALL groupings have car, van, suv - in that order. If the var values are empty, that's fine i can handle that with missing option.
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