Frequencies for dementia variable in snp2014 dataset :

   Dementia |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,031       99.88       99.88
          * |         10        0.12      100.00
------------+-----------------------------------
      Total |      8,041      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016