Frequencies for first 10,000 rows of ab_seiz variable in natlterr2006 dataset :

   Seizures |
        RFP |
633=f_ab_se |
       iz R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,275       62.75       62.75
          N |      3,717       37.17       99.92
          Y |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015