Frequencies for first 10,000 rows of mage36 variable in natlterr1994 dataset :

     Age of |
     Mother |
  recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         75        0.75        0.75
          2 |        152        1.52        2.27
          3 |        322        3.22        5.49
          4 |        440        4.40        9.89
          5 |        520        5.20       15.09
          6 |        573        5.73       20.82
          7 |        621        6.21       27.03
          8 |        662        6.62       33.65
          9 |        639        6.39       40.04
         10 |        643        6.43       46.47
         11 |        611        6.11       52.58
         12 |        588        5.88       58.46
         13 |        541        5.41       63.87
         14 |        535        5.35       69.22
         15 |        494        4.94       74.16
         16 |        439        4.39       78.55
         17 |        391        3.91       82.46
         18 |        365        3.65       86.11
         19 |        266        2.66       88.77
         20 |        226        2.26       91.03
         21 |        191        1.91       92.94
         22 |        186        1.86       94.80
         23 |        151        1.51       96.31
         24 |        115        1.15       97.46
         25 |         82        0.82       98.28
         26 |         66        0.66       98.94
         27 |         31        0.31       99.25
         28 |         29        0.29       99.54
         29 |         26        0.26       99.80
         30 |          9        0.09       99.89
         31 |          9        0.09       99.98
         33 |          1        0.01       99.99
         35 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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