Frequencies for first 10,000 rows of ewarner variable in nhamcsed2012 dataset :

  Recode of |
 EWARNE for |
   trending |
  with data |
   prior to |
       2010 |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016