Frequencies for first 10,000 rows of urlgy_srgry_sw variable in pos2011 dataset :

Speciality: |
    Urology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        354        3.54        3.54
          N |      9,533       95.33       98.87
          Y |        113        1.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019