Frequencies for city variable in zipmil_12q4 dataset : name of | city/org | Freq. Percent Cum. ------------+----------------------------------- APO | 248 46.10 46.10 DPO | 100 18.59 64.68 FPO | 190 35.32 100.00 ------------+----------------------------------- 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/city.log | egrep