Frequencies for first 10,000 rows of dmeduc variable in natl1983 dataset :

  Education |
  of Mother |
     Detail |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          5        0.05        0.05
          2 |          3        0.03        0.08
          3 |          3        0.03        0.11
          4 |         10        0.10        0.21
          5 |         10        0.10        0.31
          6 |         45        0.45        0.76
          7 |        118        1.18        1.94
          8 |        316        3.16        5.10
          9 |        631        6.31       11.41
         10 |        888        8.88       20.29
         11 |        988        9.88       30.17
         12 |      4,055       40.55       70.72
         13 |        698        6.98       77.70
         14 |        784        7.84       85.54
         15 |        272        2.72       88.26
         16 |        827        8.27       96.53
         17 |        332        3.32       99.85
         99 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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