Frequencies for first 10,000 rows of nochron variable in namcs2011 dataset :

 Does patient now |
have: None of the |
   listed chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
               No |      5,294       52.94       52.94
              Yes |      4,530       45.30       98.24
Entire item blank |        176        1.76      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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