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

  Education |
  of Mother |
     Detail |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |          2        0.02        0.04
          2 |          5        0.05        0.09
          3 |          1        0.01        0.10
          4 |          5        0.05        0.15
          5 |          5        0.05        0.20
          6 |         41        0.41        0.61
          7 |        115        1.15        1.76
          8 |        301        3.01        4.77
          9 |        541        5.41       10.18
         10 |        712        7.12       17.30
         11 |        893        8.93       26.23
         12 |      3,929       39.29       65.52
         13 |        779        7.79       73.31
         14 |        841        8.41       81.72
         15 |        305        3.05       84.77
         16 |        914        9.14       93.91
         17 |        415        4.15       98.06
         99 |        194        1.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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