Frequencies for first 10,000 rows of dfeduc variable in natl1980 dataset :

  Education |
  of Father |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |          2        0.02        0.09
          2 |          3        0.03        0.12
          3 |         10        0.10        0.22
          4 |         13        0.13        0.35
          5 |         17        0.17        0.52
          6 |         70        0.70        1.22
          7 |        114        1.14        2.36
          8 |        214        2.14        4.50
          9 |        340        3.40        7.90
         10 |        540        5.40       13.30
         11 |        568        5.68       18.98
         12 |      3,115       31.15       50.13
         13 |        388        3.88       54.01
         14 |        661        6.61       60.62
         15 |        278        2.78       63.40
         16 |        828        8.28       71.68
         17 |        517        5.17       76.85
         99 |      2,315       23.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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