Frequencies for first 10,000 rows of dfeduc variable in natl1978 dataset :

  Education |
  of Father |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          9        0.09        0.09
          1 |          4        0.04        0.13
          2 |          3        0.03        0.16
          3 |         17        0.17        0.33
          4 |         17        0.17        0.50
          5 |         18        0.18        0.68
          6 |         73        0.73        1.41
          7 |        119        1.19        2.60
          8 |        256        2.56        5.16
          9 |        379        3.79        8.95
         10 |        558        5.58       14.53
         11 |        590        5.90       20.43
         12 |      3,180       31.80       52.23
         13 |        404        4.04       56.27
         14 |        649        6.49       62.76
         15 |        238        2.38       65.14
         16 |        751        7.51       72.65
         17 |        462        4.62       77.27
         99 |      2,273       22.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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