Frequencies for first 10,000 rows of prov2455 variable in pos1995 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,886       88.86       88.86
          0 |        233        2.33       91.19
          1 |        726        7.26       98.45
          2 |        130        1.30       99.75
          3 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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