Frequencies for first 10,000 rows of quarterbegindate variable in sdued2016 dataset :

    Quarter |
 Begin Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 01/01/2016 |      9,533       95.33       95.33
 04/01/2016 |        467        4.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Feb 2018