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

      SPEC: |
    UROLOGY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,632       96.32       96.32
          N |        255        2.55       98.87
          Y |        113        1.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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