Frequencies for first 10,000 rows of mage36 variable in natl1995 dataset :

     Age of |
     Mother |
  recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         55        0.55        0.55
          2 |        105        1.05        1.60
          3 |        271        2.71        4.31
          4 |        364        3.64        7.95
          5 |        466        4.66       12.61
          6 |        601        6.01       18.62
          7 |        635        6.35       24.97
          8 |        568        5.68       30.65
          9 |        596        5.96       36.61
         10 |        621        6.21       42.82
         11 |        621        6.21       49.03
         12 |        601        6.01       55.04
         13 |        499        4.99       60.03
         14 |        504        5.04       65.07
         15 |        527        5.27       70.34
         16 |        510        5.10       75.44
         17 |        456        4.56       80.00
         18 |        387        3.87       83.87
         19 |        382        3.82       87.69
         20 |        273        2.73       90.42
         21 |        242        2.42       92.84
         22 |        189        1.89       94.73
         23 |        168        1.68       96.41
         24 |        120        1.20       97.61
         25 |         80        0.80       98.41
         26 |         51        0.51       98.92
         27 |         52        0.52       99.44
         28 |         28        0.28       99.72
         29 |          7        0.07       99.79
         30 |         10        0.10       99.89
         31 |          5        0.05       99.94
         32 |          2        0.02       99.96
         33 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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