Frequencies for first 10,000 rows of opthmlgy_srgry_sw variable in pos2016 dataset :

   Surgical |
 Specialty: |
Ophthalmolo |
        gic |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,575       95.75       95.75
          N |        202        2.02       97.77
          Y |        223        2.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017