Frequencies for first 10,000 rows of med variable in nhamcsopd2007 dataset :

   was medication |
       ordered or |
        provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      2,979       29.79       29.79
              yes |      6,795       67.95       97.74
entire item blank |        226        2.26      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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