Frequencies for first 10,000 rows of dmeduc variable in natl1987 dataset :

  Education |
  of Mother |
     Detail |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          6        0.06        0.06
          1 |          2        0.02        0.08
          2 |          1        0.01        0.09
          3 |          2        0.02        0.11
          4 |          2        0.02        0.13
          5 |          1        0.01        0.14
          6 |         29        0.29        0.43
          7 |        110        1.10        1.53
          8 |        303        3.03        4.56
          9 |        607        6.07       10.63
         10 |        777        7.77       18.40
         11 |        958        9.58       27.98
         12 |      3,859       38.59       66.57
         13 |        776        7.76       74.33
         14 |        910        9.10       83.43
         15 |        299        2.99       86.42
         16 |        965        9.65       96.07
         17 |        366        3.66       99.73
         99 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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