Frequencies for first 10,000 rows of ot_srvc_cd variable in pos2018 dataset :

  Services: |
    OT Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      6,341       63.41       63.41
          0 |        992        9.92       73.33
          1 |      1,172       11.72       85.05
          2 |      1,290       12.90       97.95
          3 |        205        2.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019