Frequencies for first 10,000 rows of scopproc variable in namcs2007 dataset :

      scope |
  procedure |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,873       98.73       98.73
        yes |        127        1.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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