Frequencies for first 10,000 rows of sigmoid variable in namcs2012 dataset :

Sigmoidosco |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,976       99.76       99.76
        Yes |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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