Frequencies for first 10,000 rows of prov2070 variable in pos2005 dataset :

       srv: |
 anesthesia |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,731       87.31       87.31
          0 |        416        4.16       91.47
          1 |        394        3.94       95.41
          2 |        399        3.99       99.40
          3 |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017