Frequencies for first 10,000 rows of prov2455 variable in pos2004 dataset :

       srv: |
respiratory |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,635       86.35       86.35
          0 |        329        3.29       89.64
          1 |        873        8.73       98.37
          2 |        133        1.33       99.70
          3 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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