Frequencies for first 10,000 rows of psychlgcl_srvc_cd variable in pos1992 dataset :

       srv: |
psychologic |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,961       99.61       99.61
          0 |          9        0.09       99.70
          1 |          5        0.05       99.75
          2 |         10        0.10       99.85
          3 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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