Frequencies for first 10,000 rows of mage8 variable in natl1992 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         57        0.57        0.57
          2 |      1,692       16.92       17.49
          3 |      3,102       31.02       48.51
          4 |      2,799       27.99       76.50
          5 |      1,713       17.13       93.63
          6 |        558        5.58       99.21
          7 |         77        0.77       99.98
          8 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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