Frequencies for first 10,000 rows of dmeduc variable in natl1976 dataset :

  Education |
  of Mother |
     Detail |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |          1        0.01        0.02
          2 |          5        0.05        0.07
          3 |          8        0.08        0.15
          4 |         11        0.11        0.26
          5 |         28        0.28        0.54
          6 |         91        0.91        1.45
          7 |        210        2.10        3.55
          8 |        476        4.76        8.31
          9 |        892        8.92       17.23
         10 |      1,111       11.11       28.34
         11 |      1,080       10.80       39.14
         12 |      4,018       40.18       79.32
         13 |        517        5.17       84.49
         14 |        470        4.70       89.19
         15 |        193        1.93       91.12
         16 |        614        6.14       97.26
         17 |        198        1.98       99.24
         99 |         76        0.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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