Frequencies for first 10,000 rows of mage36 variable in natl1992 dataset :

     Age of |
     Mother |
  recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         57        0.57        0.57
          2 |         95        0.95        1.52
          3 |        196        1.96        3.48
          4 |        310        3.10        6.58
          5 |        475        4.75       11.33
          6 |        616        6.16       17.49
          7 |        638        6.38       23.87
          8 |        704        7.04       30.91
          9 |        631        6.31       37.22
         10 |        565        5.65       42.87
         11 |        564        5.64       48.51
         12 |        588        5.88       54.39
         13 |        582        5.82       60.21
         14 |        568        5.68       65.89
         15 |        557        5.57       71.46
         16 |        504        5.04       76.50
         17 |        464        4.64       81.14
         18 |        395        3.95       85.09
         19 |        312        3.12       88.21
         20 |        293        2.93       91.14
         21 |        249        2.49       93.63
         22 |        174        1.74       95.37
         23 |        143        1.43       96.80
         24 |        109        1.09       97.89
         25 |         76        0.76       98.65
         26 |         56        0.56       99.21
         27 |         31        0.31       99.52
         28 |         24        0.24       99.76
         29 |          8        0.08       99.84
         30 |         10        0.10       99.94
         31 |          4        0.04       99.98
         33 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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