Households living alone - cps

Can anyone help me figure out how to isolate the number of households living alone? the GQTYPE field does not seem to differentiate how many people live in a household, and I can only find a FAMSIZE wouldn’t track size of nonfamily households. What field can help me isolate the number of householders living alone?

The technical variable NUMPREC reports the number of person records in a given household. NUMPREC values of 1 will identify persons who live alone.