Frequencies for first 10,000 rows of dntl_srvc_cd variable in pos2012 dataset :

   Services |
  Provided: |
     Dental |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,606       86.06       86.06
          0 |      1,061       10.61       96.67
          1 |        129        1.29       97.96
          2 |        179        1.79       99.75
          3 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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