Frequencies for first 10,000 rows of orthpdc_srgry_sw variable in pos2003 dataset :

      spec: |
 orthopedic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,140       91.40       91.40
          N |        515        5.15       96.55
          Y |        345        3.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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