Frequencies for dementia variable in snp2018 dataset :

   Dementia |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     11,239       99.74       99.74
          * |         29        0.26      100.00
------------+-----------------------------------
      Total |     11,268      100.00

by Jean Roth , jroth@nber.org , 10 Sep 2018