Frequencies for first 10,000 rows of med variable in nhamcsopd1992 dataset :

       Were |
medications |
 ordered or |
  provided? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,014       50.14       50.14
        Yes |      4,986       49.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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