Frequencies for first 10,000 rows of mage36 variable in natl2001 dataset :

     Age of |
     Mother |
  Recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         34        0.34        0.34
          2 |         77        0.77        1.11
          3 |        156        1.56        2.67
          4 |        314        3.14        5.81
          5 |        423        4.23       10.04
          6 |        566        5.66       15.70
          7 |        677        6.77       22.47
          8 |        656        6.56       29.03
          9 |        651        6.51       35.54
         10 |        620        6.20       41.74
         11 |        592        5.92       47.66
         12 |        585        5.85       53.51
         13 |        532        5.32       58.83
         14 |        528        5.28       64.11
         15 |        473        4.73       68.84
         16 |        526        5.26       74.10
         17 |        476        4.76       78.86
         18 |        399        3.99       82.85
         19 |        316        3.16       86.01
         20 |        278        2.78       88.79
         21 |        239        2.39       91.18
         22 |        233        2.33       93.51
         23 |        191        1.91       95.42
         24 |        131        1.31       96.73
         25 |        105        1.05       97.78
         26 |         84        0.84       98.62
         27 |         47        0.47       99.09
         28 |         38        0.38       99.47
         29 |         22        0.22       99.69
         30 |         15        0.15       99.84
         31 |          8        0.08       99.92
         32 |          5        0.05       99.97
         33 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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