Frequencies for first 10,000 rows of psych_srvc_cd variable in pos1994 dataset :

       srv: |
psychiatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,940       89.40       89.40
          0 |        596        5.96       95.36
          1 |        339        3.39       98.75
          2 |         86        0.86       99.61
          3 |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017