Frequencies for first 10,000 rows of mar variable in natl2012 dataset :

   Mother's |
    Marital |
 Status U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,245       62.45       62.45
          2 |      3,755       37.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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