Frequencies for first 10,000 rows of umeduc variable in linkpe2009psden dataset :

   Mother's |
Education U |
 (f_med rep |
      flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |          1        0.01        0.03
          3 |          4        0.04        0.07
          4 |          7        0.07        0.14
          5 |          8        0.08        0.22
          6 |          8        0.08        0.30
          7 |         13        0.13        0.43
          8 |         72        0.72        1.15
          9 |         86        0.86        2.01
         10 |        216        2.16        4.17
         11 |        444        4.44        8.61
         12 |      1,437       14.37       22.98
         13 |        126        1.26       24.24
         14 |        292        2.92       27.16
         15 |         92        0.92       28.08
         16 |        437        4.37       32.45
         17 |        140        1.40       33.85
         99 |         37        0.37       34.22
          . |      6,578       65.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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