Frequencies for first 10,000 rows of quarterbegin variable in sdued1999 dataset

    Quarter |
      Begin |      Freq.     Percent        Cum.
------------+-----------------------------------
        1/1 |      6,451       64.51       64.51
        4/1 |      3,549       35.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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