Frequencies for seq6 variable in vehnit dataset :

    EVENT 6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          4        0.27        0.27
         99 |      1,477       99.73      100.00
------------+-----------------------------------
      Total |      1,481      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016