Frequencies for first 10,000 rows of primaryreason variable in nadacc20160217 dataset :

Primary Reason |      Freq.     Percent        Cum.
---------------+-----------------------------------
   Survey Rate |      9,996       99.96       99.96
WAC Adjustment |          4        0.04      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Feb 2018