Frequencies for first 10,000 rows of mager variable in natl2014 dataset :

   Mother's |
     Single |
   Years of |
Age 12 10 - |
   12 years |      Freq.     Percent        Cum.
------------+-----------------------------------
         13 |          1        0.01        0.01
         14 |          5        0.05        0.06
         15 |          8        0.08        0.14
         16 |         43        0.43        0.57
         17 |         72        0.72        1.29
         18 |        175        1.75        3.04
         19 |        282        2.82        5.86
         20 |        404        4.04        9.90
         21 |        456        4.56       14.46
         22 |        555        5.55       20.01
         23 |        613        6.13       26.14
         24 |        614        6.14       32.28
         25 |        638        6.38       38.66
         26 |        608        6.08       44.74
         27 |        592        5.92       50.66
         28 |        652        6.52       57.18
         29 |        595        5.95       63.13
         30 |        548        5.48       68.61
         31 |        578        5.78       74.39
         32 |        512        5.12       79.51
         33 |        465        4.65       84.16
         34 |        395        3.95       88.11
         35 |        281        2.81       90.92
         36 |        267        2.67       93.59
         37 |        160        1.60       95.19
         38 |        151        1.51       96.70
         39 |        106        1.06       97.76
         40 |         87        0.87       98.63
         41 |         53        0.53       99.16
         42 |         38        0.38       99.54
         43 |         19        0.19       99.73
         44 |         12        0.12       99.85
         45 |          6        0.06       99.91
         46 |          3        0.03       99.94
         47 |          3        0.03       99.97
         48 |          2        0.02       99.99
         50 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016