Frequencies for first 10,000 rows of dmeduc variable in natlterr2000 dataset :

  Education |
  of Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |          5        0.05        0.07
          2 |         15        0.15        0.22
          3 |          9        0.09        0.31
          4 |         28        0.28        0.59
          5 |         47        0.47        1.06
          6 |        105        1.05        2.11
          7 |        262        2.62        4.73
          8 |        395        3.95        8.68
          9 |        650        6.50       15.18
         10 |        514        5.14       20.32
         11 |        715        7.15       27.47
         12 |      2,900       29.00       56.47
         13 |        513        5.13       61.60
         14 |      1,278       12.78       74.38
         15 |        534        5.34       79.72
         16 |      1,675       16.75       96.47
         17 |        323        3.23       99.70
         99 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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