Frequencies for first 10,000 rows of psychlgcl_srvc_cd variable in pos2010 dataset :

       SRV: |
PSYCHOLOGIC |
         AL |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,860       98.60       98.60
          0 |         84        0.84       99.44
          1 |         15        0.15       99.59
          2 |         20        0.20       99.79
          3 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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