Frequencies for first 10,000 rows of PSYCH_UNIT_TRMNN_DT variable in pos2011 dataset :

PSYCH_UNIT_ |
   TRMNN_DT |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2019