Frequencies for first 10,000 rows of mager14 variable in natlterr2007 dataset :

   Mother's |
 Age Recode |
     14 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         25        0.25        0.25
          3 |         59        0.59        0.84
          4 |        144        1.44        2.28
          5 |        274        2.74        5.02
          6 |        381        3.81        8.83
          7 |        483        4.83       13.66
          8 |      2,750       27.50       41.16
          9 |      2,665       26.65       67.81
         10 |      1,973       19.73       87.54
         11 |      1,004       10.04       97.58
         12 |        226        2.26       99.84
         13 |         14        0.14       99.98
         14 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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