Frequencies for first 10,000 rows of nochron variable in namcs2006 dataset :

 does patient now |
   have - none of |
       the listed |
          chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      5,047       50.47       50.47
              yes |      4,639       46.39       96.86
entire item blank |        314        3.14      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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