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

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        532        5.32       94.03
          1 |        555        5.55       99.58
          2 |         26        0.26       99.84
          3 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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