Frequencies for first 10,000 rows of mar variable in natlterr2012 dataset :

   Mother's |
    Marital |
 Status U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,065       40.65       40.65
          2 |      5,935       59.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016