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

       SRV: |
 OUTPATIENT |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,626       86.26       86.26
          0 |        308        3.08       89.34
          1 |        953        9.53       98.87
          2 |         35        0.35       99.22
          3 |         78        0.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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