How do I build a frequency table without including missing values as a category in the TABLES statement? I thought SAS doesn't include missing values as a category by default, but when I run the code below, that doesn't seem to be the case (missing values in 'ethnicity' are interpreted as a category in my output data set 'eth'). proc freq data=dt noprint ; by firm year; tables ethnicity / out=eth ; run; Sample output: firm year ethnicity percent 1 1990 . 50 1 1990 caucasian 50
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