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

  Services: |
    OT Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      6,127       61.27       61.27
          0 |      1,183       11.83       73.10
          1 |      1,281       12.81       85.91
          2 |      1,210       12.10       98.01
          3 |        199        1.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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