Frequencies for first 10,000 rows of dmeduc variable in linkco1991us_num dataset :

  Education |
  of Mother |
     Detail |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        139        1.39        1.39
          1 |         23        0.23        1.62
          2 |         30        0.30        1.92
          3 |         60        0.60        2.52
          4 |         52        0.52        3.04
          5 |         58        0.58        3.62
          6 |        298        2.98        6.60
          7 |        115        1.15        7.75
          8 |        285        2.85       10.60
          9 |        619        6.19       16.79
         10 |        757        7.57       24.36
         11 |      1,043       10.43       34.79
         12 |      3,554       35.54       70.33
         13 |        590        5.90       76.23
         14 |        691        6.91       83.14
         15 |        269        2.69       85.83
         16 |        614        6.14       91.97
         17 |        378        3.78       95.75
         99 |        425        4.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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