Frequencies for first 10,000 rows of dfeduc variable in natl1977 dataset :

  Education |
  of Father |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         11        0.11        0.11
          1 |          4        0.04        0.15
          2 |         10        0.10        0.25
          3 |          8        0.08        0.33
          4 |         16        0.16        0.49
          5 |         25        0.25        0.74
          6 |         70        0.70        1.44
          7 |        152        1.52        2.96
          8 |        254        2.54        5.50
          9 |        429        4.29        9.79
         10 |        612        6.12       15.91
         11 |        604        6.04       21.95
         12 |      3,303       33.03       54.98
         13 |        345        3.45       58.43
         14 |        566        5.66       64.09
         15 |        246        2.46       66.55
         16 |        690        6.90       73.45
         17 |        437        4.37       77.82
         99 |      2,218       22.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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