Frequencies for chronicheartfailure variable in snp2018 dataset :

    Chronic |
      Heart |
    Failure |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     11,244       99.79       99.79
          * |         24        0.21      100.00
------------+-----------------------------------
      Total |     11,268      100.00

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