Frequencies for first 10,000 rows of op_srvc_cd variable in pos2008 dataset :

       srv: |
 outpatient |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |        300        3.00       89.55
          1 |        950        9.50       99.05
          2 |         29        0.29       99.34
          3 |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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