Frequencies for first 10,000 rows of op_srvc_cd variable in pos2000 dataset :

       srv: |
 outpatient |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        246        2.46       91.17
          1 |        813        8.13       99.30
          2 |         25        0.25       99.55
          3 |         45        0.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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