Frequencies for first 10,000 rows of scpwi22d variable in namcs2008 dataset :

scope write |
  in #2 - 2 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,994       99.94       99.94
         45 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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