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

      spec: |
    urology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,650       96.50       96.50
          N |        233        2.33       98.83
          Y |        117        1.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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