Frequencies for first 10,000 rows of prov2455 variable in pos2001 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,741       87.41       87.41
          0 |        298        2.98       90.39
          1 |        798        7.98       98.37
          2 |        138        1.38       99.75
          3 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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