Frequencies for first 10,000 rows of prov2455 variable in pos1992 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,812       88.12       88.12
          0 |        240        2.40       90.52
          1 |        776        7.76       98.28
          2 |        147        1.47       99.75
          3 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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