Frequencies for first 10,000 rows of mager14 variable in natl2009 dataset :

   Mother's |
 Age Recode |
     14 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         20        0.20        0.20
          3 |         49        0.49        0.69
          4 |        112        1.12        1.81
          5 |        207        2.07        3.88
          6 |        359        3.59        7.47
          7 |        500        5.00       12.47
          8 |      2,887       28.87       41.34
          9 |      2,950       29.50       70.84
         10 |      1,902       19.02       89.86
         11 |        823        8.23       98.09
         12 |        178        1.78       99.87
         13 |         12        0.12       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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