Frequencies for first 10,000 rows of bwtr12 variable in natlterr2015 dataset :

      Birth |
     Weight |
  Recode 12 |
  01 0227 - |
 0499 grams |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.10        0.10
          2 |         39        0.39        0.49
          3 |         75        0.75        1.24
          4 |        124        1.24        2.48
          5 |        611        6.11        8.59
          6 |      2,272       22.72       31.31
          7 |      4,215       42.15       73.46
          8 |      2,037       20.37       93.83
          9 |        489        4.89       98.72
         10 |         65        0.65       99.37
         11 |         13        0.13       99.50
         12 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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