Frequencies for first 10,000 rows of dmeduc variable in natl1986 dataset :

  Education |
  of Mother |
     Detail |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          5        0.05        0.05
          1 |          1        0.01        0.06
          2 |          3        0.03        0.09
          3 |          1        0.01        0.10
          4 |          1        0.01        0.11
          5 |          6        0.06        0.17
          6 |         49        0.49        0.66
          7 |        111        1.11        1.77
          8 |        292        2.92        4.69
          9 |        570        5.70       10.39
         10 |        816        8.16       18.55
         11 |        942        9.42       27.97
         12 |      3,980       39.80       67.77
         13 |        729        7.29       75.06
         14 |        861        8.61       83.67
         15 |        305        3.05       86.72
         16 |        940        9.40       96.12
         17 |        364        3.64       99.76
         99 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016