Frequencies for first 10,000 rows of f_dwgt variable in natlterr2011 dataset :

   Delivery |
     Weight |
   (dwgt) R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,557       45.57       45.57
          1 |      5,443       54.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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