Frequencies for first 10,000 rows of prov2455 variable in pos1993 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,816       88.16       88.16
          0 |        237        2.37       90.53
          1 |        782        7.82       98.35
          2 |        137        1.37       99.72
          3 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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