Frequencies for first 10,000 rows of mage8 variable in natl2001 dataset :

     Age of |
     Mother |
   Recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         34        0.34        0.34
          2 |      1,536       15.36       15.70
          3 |      3,196       31.96       47.66
          4 |      2,644       26.44       74.10
          5 |      1,708       17.08       91.18
          6 |        744        7.44       98.62
          7 |        130        1.30       99.92
          8 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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