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

  Education |
  of Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.02        0.02
          2 |          1        0.01        0.03
          3 |          1        0.01        0.04
          4 |          2        0.02        0.06
          5 |          5        0.05        0.11
          6 |         31        0.31        0.42
          7 |        120        1.20        1.62
          8 |        301        3.01        4.63
          9 |        553        5.53       10.16
         10 |        770        7.70       17.86
         11 |        888        8.88       26.74
         12 |      3,703       37.03       63.77
         13 |        827        8.27       72.04
         14 |        975        9.75       81.79
         15 |        341        3.41       85.20
         16 |      1,048       10.48       95.68
         17 |        417        4.17       99.85
         99 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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