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

  Services: |
Dental Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,580       85.80       85.80
          0 |      1,068       10.68       96.48
          1 |        135        1.35       97.83
          2 |        185        1.85       99.68
          3 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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