Frequencies for first 10,000 rows of prov2355 variable in pos2010 dataset :

       SRV: |
 OUTPATIENT |
    SURGERY |
       UNIT |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,626       86.26       86.26
          0 |        606        6.06       92.32
          1 |        697        6.97       99.29
          2 |         38        0.38       99.67
          3 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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