Frequencies for first 10,000 rows of oegest_r10 variable in natl2014 dataset :

  Obstetric |
   Estimate |
Recode10 01 |
   Under 20 |
      weeks |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         42        0.42        0.42
          3 |         57        0.57        0.99
          4 |         90        0.90        1.89
          5 |        642        6.42        8.31
          6 |      2,521       25.21       33.52
          7 |      3,040       30.40       63.92
          8 |      2,509       25.09       89.01
          9 |        987        9.87       98.88
         10 |         91        0.91       99.79
         99 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016