Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2015 dataset :

  Services: |
    PT Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      6,061       60.61       60.61
          0 |        373        3.73       64.34
          1 |      1,917       19.17       83.51
          2 |      1,305       13.05       96.56
          3 |        344        3.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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