Frequencies for first 10,000 rows of day variable in nadacc20170517 dataset :

        Day |      Freq.     Percent        Cum.
------------+-----------------------------------
         17 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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