Frequencies for first 10,000 rows of bwtr4 variable in natlterr2015 dataset :

      Birth |
     Weight |
 Recode 4 1 |
0227 - 1499 |
      grams |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        124        1.24        1.24
          2 |        735        7.35        8.59
          3 |      9,091       90.91       99.50
          4 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016