Frequencies for first 10,000 rows of dmeduc variable in natl1989 dataset :

  Education |
  of Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.01        0.01
          3 |          2        0.02        0.03
          4 |          3        0.03        0.06
          5 |          3        0.03        0.09
          6 |         24        0.24        0.33
          7 |        109        1.09        1.42
          8 |        310        3.10        4.52
          9 |        553        5.53       10.05
         10 |        734        7.34       17.39
         11 |        915        9.15       26.54
         12 |      3,775       37.75       64.29
         13 |        782        7.82       72.11
         14 |        958        9.58       81.69
         15 |        326        3.26       84.95
         16 |        954        9.54       94.49
         17 |        428        4.28       98.77
         99 |        123        1.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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