Frequencies for first 10,000 rows of scopproc variable in namcs2004 dataset :

      scope |
  procedure |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,668       96.68       96.68
          1 |        332        3.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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