Frequencies for first 10,000 rows of psych_srvc_cd variable in pos2017 dataset 

  Services: |
      Adult |
  Inpatient |
Psychiatric |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,569       85.69       85.69
          0 |        946        9.46       95.15
          1 |        340        3.40       98.55
          2 |         80        0.80       99.35
          3 |         65        0.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018