Frequencies for first 10,000 rows of mage36 variable in natl1996 dataset :

     Age of |
     Mother |
  recode 36 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         54        0.54        0.54
          2 |        116        1.16        1.70
          3 |        246        2.46        4.16
          4 |        383        3.83        7.99
          5 |        516        5.16       13.15
          6 |        608        6.08       19.23
          7 |        593        5.93       25.16
          8 |        655        6.55       31.71
          9 |        592        5.92       37.63
         10 |        564        5.64       43.27
         11 |        623        6.23       49.50
         12 |        549        5.49       54.99
         13 |        529        5.29       60.28
         14 |        504        5.04       65.32
         15 |        454        4.54       69.86
         16 |        447        4.47       74.33
         17 |        402        4.02       78.35
         18 |        402        4.02       82.37
         19 |        377        3.77       86.14
         20 |        310        3.10       89.24
         21 |        268        2.68       91.92
         22 |        228        2.28       94.20
         23 |        154        1.54       95.74
         24 |        130        1.30       97.04
         25 |         98        0.98       98.02
         26 |         77        0.77       98.79
         27 |         51        0.51       99.30
         28 |         31        0.31       99.61
         29 |         23        0.23       99.84
         30 |          6        0.06       99.90
         31 |          6        0.06       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