Frequencies for first 10,000 rows of nochron variable in namcs2014 dataset :

 Does patient now |
have: None of the |
            above |      Freq.     Percent        Cum.
------------------+-----------------------------------
               No |      5,865       58.65       58.65
              Yes |      3,998       39.98       98.63
Entire item blank |        137        1.37      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017