Frequencies for first 10,000 rows of psychlgcl_srvc_cd variable in pos2005 dataset :

       srv: |
psychologic |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,865       98.65       98.65
          0 |         80        0.80       99.45
          1 |         13        0.13       99.58
          2 |         21        0.21       99.79
          3 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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