Frequencies for first 10,000 rows of scopproc variable in nhamcsopd2007 dataset :

      scope |
  procedure |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,752       97.52       97.52
        yes |        248        2.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016