Frequencies for first 10,000 rows of scopproc variable in namcs2002 dataset :

      Scope |
  procedure |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,697       96.97       96.97
        Yes |        303        3.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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