Frequencies for first 10,000 rows of psych_srvc_cd variable in pos2013 dataset 

  Services: |
      Adult |
  Inpatient |
Psychiatric |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,601       86.01       86.01
          0 |        901        9.01       95.02
          1 |        352        3.52       98.54
          2 |         84        0.84       99.38
          3 |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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