Frequencies for first 10,000 rows of prov2070 variable in pos2002 dataset :

       srv: |
 anesthesia |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,812       88.12       88.12
          0 |        388        3.88       92.00
          1 |        376        3.76       95.76
          2 |        373        3.73       99.49
          3 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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