Frequencies for first 10,000 rows of dfeduc variable in natl1993 dataset :

  Education |
  of Father |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |         11        0.11        0.13
          2 |          4        0.04        0.17
          3 |          2        0.02        0.19
          4 |          3        0.03        0.22
          5 |          1        0.01        0.23
          6 |         18        0.18        0.41
          7 |         38        0.38        0.79
          8 |         98        0.98        1.77
          9 |        176        1.76        3.53
         10 |        309        3.09        6.62
         11 |        400        4.00       10.62
         12 |      2,500       25.00       35.62
         13 |        360        3.60       39.22
         14 |        729        7.29       46.51
         15 |        215        2.15       48.66
         16 |        903        9.03       57.69
         17 |        577        5.77       63.46
         99 |      3,654       36.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015