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

  Services: |
    OT Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      5,988       59.88       59.88
          0 |      1,205       12.05       71.93
          1 |      1,317       13.17       85.10
          2 |      1,264       12.64       97.74
          3 |        226        2.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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