Frequencies for chronicheartfailure variable in snp2016 dataset :

    Chronic |
      Heart |
    Failure |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,373       99.61       99.61
          * |         33        0.39      100.00
------------+-----------------------------------
      Total |      8,406      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018