Frequencies for first 10,000 rows of dmeduc variable in natl2000 dataset :

  Education |
  of Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |          6        0.06        0.08
          2 |          4        0.04        0.12
          3 |         10        0.10        0.22
          4 |          5        0.05        0.27
          5 |          3        0.03        0.30
          6 |         53        0.53        0.83
          7 |         55        0.55        1.38
          8 |        218        2.18        3.56
          9 |        475        4.75        8.31
         10 |        653        6.53       14.84
         11 |        854        8.54       23.38
         12 |      3,234       32.34       55.72
         13 |        762        7.62       63.34
         14 |      1,172       11.72       75.06
         15 |        397        3.97       79.03
         16 |      1,375       13.75       92.78
         17 |        697        6.97       99.75
         99 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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