Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2016 dataset :

  Services: |
    PT Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      6,127       61.27       61.27
          0 |        380        3.80       65.07
          1 |      1,886       18.86       83.93
          2 |      1,283       12.83       96.76
          3 |        324        3.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017