Frequencies for first 10,000 rows of ckd variable in nhamcsed2014 dataset :

       Does |
    patient |
      have: |
    Chronic |
     kidney |
    disease |
      (CKD) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,814       98.14       98.14
        Yes |        186        1.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017