Frequencies for first 10,000 rows of prov2355 variable in pos2006 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |        587        5.87       92.97
          1 |        651        6.51       99.48
          2 |         35        0.35       99.83
          3 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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