Frequencies for first 10,000 rows of nochron variable in nhamcsopd2011 dataset :

 Does patient now |
   have - None of |
       the listed |
          chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
               No |      5,575       55.75       55.75
              Yes |      4,261       42.61       98.36
Entire item blank |        164        1.64      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016