Frequencies for first 10,000 rows of dmeduc variable in natl1998 dataset :

  Education |
  of Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |          1        0.01        0.02
          2 |          4        0.04        0.06
          3 |          2        0.02        0.08
          4 |          6        0.06        0.14
          5 |          7        0.07        0.21
          6 |         52        0.52        0.73
          7 |         84        0.84        1.57
          8 |        242        2.42        3.99
          9 |        502        5.02        9.01
         10 |        706        7.06       16.07
         11 |        807        8.07       24.14
         12 |      3,320       33.20       57.34
         13 |        820        8.20       65.54
         14 |      1,144       11.44       76.98
         15 |        392        3.92       80.90
         16 |      1,281       12.81       93.71
         17 |        603        6.03       99.74
         99 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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