Frequencies for first 10,000 rows of mager14 variable in natlterr2013 dataset :

   Mother's |
 Age Recode |
     14 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         14        0.14        0.14
          3 |         58        0.58        0.72
          4 |        131        1.31        2.03
          5 |        231        2.31        4.34
          6 |        369        3.69        8.03
          7 |        493        4.93       12.96
          8 |      2,965       29.65       42.61
          9 |      2,523       25.23       67.84
         10 |      1,947       19.47       87.31
         11 |        992        9.92       97.23
         12 |        267        2.67       99.90
         13 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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