Frequencies for first 10,000 rows of prov6225 variable in pos2006 dataset :

       srv: |
 orthopedic |
    surgery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |      1,216       12.16       99.26
          1 |         66        0.66       99.92
          2 |          5        0.05       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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