Frequencies for first 10,000 rows of prov2455 variable in pos1998 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,747       87.47       87.47
          0 |        262        2.62       90.09
          1 |        812        8.12       98.21
          2 |        147        1.47       99.68
          3 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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