Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2014 dataset :

  Services: |
    PT Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      5,988       59.88       59.88
          0 |        366        3.66       63.54
          1 |      1,932       19.32       82.86
          2 |      1,339       13.39       96.25
          3 |        375        3.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016