Frequencies for first 10,000 rows of prov2455 variable in pos1996 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,746       87.46       87.46
          0 |        261        2.61       90.07
          1 |        803        8.03       98.10
          2 |        158        1.58       99.68
          3 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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