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

      spec: |
 orthopedic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,650       96.50       96.50
          N |        212        2.12       98.62
          Y |        138        1.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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