Frequencies for first 10,000 rows of bwtr12 variable in natlterr2012 dataset :

      Birth |
     Weight |
  Recode 12 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.10        0.10
          2 |         37        0.37        0.47
          3 |         53        0.53        1.00
          4 |        145        1.45        2.45
          5 |        666        6.66        9.11
          6 |      2,390       23.90       33.01
          7 |      4,094       40.94       73.95
          8 |      2,022       20.22       94.17
          9 |        415        4.15       98.32
         10 |         86        0.86       99.18
         11 |         17        0.17       99.35
         12 |         65        0.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016