Frequencies for alias_city variable in zipmil_12q4 dataset : usps - | alternate | names of | city | separated | by || | Freq. Percent Cum. ------------+----------------------------------- | 536 99.63 99.63 APO | 1 0.19 99.81 DPO | 1 0.19 100.00 ------------+----------------------------------- Total | 538 100.00 by Jean Roth , jroth@nber.org , 4 Jan 2016 tail -n+3 /homes/data/zip/sas/2012/desc/zipmil_12q4/byvar/tab/alias_city.log |