Frequencies for first 10,000 rows of opthmlgy_srgry_sw variable in pos2018 dataset :

   Surgical |
 Specialty: |
Ophthalmolo |
        gic |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,549       95.49       95.49
          N |        226        2.26       97.75
          Y |        225        2.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019