Frequencies for first 10,000 rows of mar variable in natlterr2003 dataset :

   Mother's |
    Marital |
 Status U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,784       47.84       47.84
          2 |      3,475       34.75       82.59
          3 |      1,741       17.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015