Frequencies for first 10,000 rows of mage36 variable in natl1997 dataset :

     Age of |
     Mother |
  recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         51        0.51        0.51
          2 |        113        1.13        1.64
          3 |        226        2.26        3.90
          4 |        360        3.60        7.50
          5 |        486        4.86       12.36
          6 |        563        5.63       17.99
          7 |        598        5.98       23.97
          8 |        647        6.47       30.44
          9 |        599        5.99       36.43
         10 |        565        5.65       42.08
         11 |        556        5.56       47.64
         12 |        582        5.82       53.46
         13 |        604        6.04       59.50
         14 |        573        5.73       65.23
         15 |        516        5.16       70.39
         16 |        476        4.76       75.15
         17 |        433        4.33       79.48
         18 |        383        3.83       83.31
         19 |        353        3.53       86.84
         20 |        300        3.00       89.84
         21 |        243        2.43       92.27
         22 |        214        2.14       94.41
         23 |        171        1.71       96.12
         24 |        119        1.19       97.31
         25 |         84        0.84       98.15
         26 |         72        0.72       98.87
         27 |         47        0.47       99.34
         28 |         28        0.28       99.62
         29 |         16        0.16       99.78
         30 |          9        0.09       99.87
         31 |          9        0.09       99.96
         32 |          2        0.02       99.98
         33 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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