Frequencies for first 10,000 rows of dfeduc variable in natl1988 dataset :

  Education |
  of Father |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |          1        0.01        0.02
          2 |          1        0.01        0.03
          3 |          4        0.04        0.07
          4 |          1        0.01        0.08
          5 |          4        0.04        0.12
          6 |         17        0.17        0.29
          7 |         59        0.59        0.88
          8 |        138        1.38        2.26
          9 |        262        2.62        4.88
         10 |        366        3.66        8.54
         11 |        434        4.34       12.88
         12 |      2,927       29.27       42.15
         13 |        385        3.85       46.00
         14 |        705        7.05       53.05
         15 |        221        2.21       55.26
         16 |        862        8.62       63.88
         17 |        583        5.83       69.71
         99 |      3,029       30.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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