Frequencies for first 10,000 rows of quarterbegindate variable in sdued1995 dataset :

    Quarter |
 Begin Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 01/01/1995 |      6,168       61.68       61.68
 04/01/1995 |      3,832       38.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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