Frequencies for first 10,000 rows of psych_srvc_cd variable in pos1992 dataset :

       srv: |
psychiatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |        644        6.44       94.95
          1 |        368        3.68       98.63
          2 |         97        0.97       99.60
          3 |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017