Frequencies for first 10,000 rows of suppressionused variable in sdued2005 dataset :

Suppression |
       Used |      Freq.     Percent        Cum.
------------+-----------------------------------
      false |      4,621       46.21       46.21
       true |      5,379       53.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Feb 2018