Frequencies for first 10,000 rows of mage36 variable in natl1998 dataset :

     Age of |
     Mother |
  recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         49        0.49        0.49
          2 |         93        0.93        1.42
          3 |        220        2.20        3.62
          4 |        354        3.54        7.16
          5 |        519        5.19       12.35
          6 |        592        5.92       18.27
          7 |        629        6.29       24.56
          8 |        630        6.30       30.86
          9 |        638        6.38       37.24
         10 |        581        5.81       43.05
         11 |        594        5.94       48.99
         12 |        572        5.72       54.71
         13 |        601        6.01       60.72
         14 |        560        5.60       66.32
         15 |        529        5.29       71.61
         16 |        412        4.12       75.73
         17 |        365        3.65       79.38
         18 |        345        3.45       82.83
         19 |        355        3.55       86.38
         20 |        268        2.68       89.06
         21 |        258        2.58       91.64
         22 |        202        2.02       93.66
         23 |        173        1.73       95.39
         24 |        141        1.41       96.80
         25 |         91        0.91       97.71
         26 |         91        0.91       98.62
         27 |         52        0.52       99.14
         28 |         33        0.33       99.47
         29 |         21        0.21       99.68
         30 |         18        0.18       99.86
         31 |          9        0.09       99.95
         32 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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