Frequencies for first 10,000 rows of prov2415 variable in pos1991 dataset :

       srv: |
psychiatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |        698        6.98       94.68
          1 |        382        3.82       98.50
          2 |        115        1.15       99.65
          3 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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