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

   Services |
  Provided: |
Psychiatric |
    - Adult |
      Inpat |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,606       86.06       86.06
          0 |        896        8.96       95.02
          1 |        353        3.53       98.55
          2 |         84        0.84       99.39
          3 |         61        0.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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