Frequencies for first 10,000 rows of scopproc variable in namcs2003 dataset :

      scope |
  procedure |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,669       96.69       96.69
          1 |        331        3.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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