Frequencies for first 10,000 rows of mager14 variable in natl2010 dataset :

   Mother's |
 Age Recode |
     14 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          3        0.03        0.03
          3 |         19        0.19        0.22
          4 |         66        0.66        0.88
          5 |        138        1.38        2.26
          6 |        225        2.25        4.51
          7 |        391        3.91        8.42
          8 |      2,916       29.16       37.58
          9 |      2,985       29.85       67.43
         10 |      2,137       21.37       88.80
         11 |        870        8.70       97.50
         12 |        234        2.34       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