Frequencies for first 10,000 rows of dmeduc variable in natlterr1999 dataset :

  Education |
  of Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |          4        0.04        0.11
          2 |         12        0.12        0.23
          3 |         15        0.15        0.38
          4 |         33        0.33        0.71
          5 |         36        0.36        1.07
          6 |        124        1.24        2.31
          7 |        296        2.96        5.27
          8 |        428        4.28        9.55
          9 |        629        6.29       15.84
         10 |        486        4.86       20.70
         11 |        662        6.62       27.32
         12 |      2,815       28.15       55.47
         13 |        489        4.89       60.36
         14 |      1,300       13.00       73.36
         15 |        517        5.17       78.53
         16 |      1,745       17.45       95.98
         17 |        385        3.85       99.83
         99 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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