Frequencies for first 10,000 rows of pwgt_r variable in natl2011 dataset :

Prepregnanc |
   y Weight |
 Recode RFP |
 577=f_pwgt |
          R |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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