Frequencies for first 10,000 rows of mager14 variable in natlterr2011 dataset :

   Mother's |
 Age Recode |
     14 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         23        0.23        0.23
          3 |         61        0.61        0.84
          4 |        154        1.54        2.38
          5 |        281        2.81        5.19
          6 |        390        3.90        9.09
          7 |        509        5.09       14.18
          8 |      2,942       29.42       43.60
          9 |      2,523       25.23       68.83
         10 |      1,866       18.66       87.49
         11 |        981        9.81       97.30
         12 |        249        2.49       99.79
         13 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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